- Adams, John Wagstaff; King, Robert Ugstad, 1950, Pitchblende occurrence at the Sunshine mine, Shoshone County, Idaho: Trace Elements Memorandum 29, 11 p. : ill., map ; 29 cm.; 3 figs.; 1 table,
- Akin, P. D., 1950, Some aspects of the development of ground water in the United States and in North Dakota: Open-File Report 50-53, 5 p.,
- Alexander, Walter H., Jr.; section by Breeding, S. D., 1950, Ground-water resources of Liberty County, Texas, with a section on Stream runoff: U.S. G.P.O., Water Supply Paper 1079-A, iv, p.1-61 . :ill., maps ;24 cm.,
- Anderson, F. J., 1950, Radiometric reconnaissance in the vicinity of Salmon, Idaho: Trace Elements Memorandum 26, 11 p., [1] folded leaf of plates : map ; 29 cm.,
- Anderson, Frank J., 1950, Reconnaissance of some geologic formations in southeastern Idaho, western Wyoming, and northern Utah: Trace Elements Investigations 72, 5 leaves, 1 leaf of plates : map ; 29 cm.,
- Armstrong, Frank C.; Full, Roy P., 1950, Geologic maps of Crystal graphite mine, Beaverhead County, Montana: Open-File Report 50-26, 6 maps,
- Averitt, Paul; Berryhill, Louise R., 1950, Coal resources of the United States, A progress report, November 1, 1950: Govt. pr. off., Circular 94, ii, 33 p. :tables ;27 cm.,
- Bailey, Edgar Herbert, 1950, Some exploration possibilities at the New Almaden quicksilver mine, Santa Clara County, California: U.S. Geological Survey], Open-File Report 50-27, 9 p., 2 ill., folded map ;27 cm.,
- Balsley, J. R., Jr., 1950, Aeromagnetic-geologic maps of Cranberry Lake, Starke, and Childwood quadrangles and part of Russel quadrangle, New York: Open-File Report 50-28, 2 maps,
- Bannerman, Harold MacColl; Pecora, William Thomas, 1950, Training geologists: A United States Geological Survey viewpoint: U.S. Geological Survey, Circular 73, 6 p. ;27 cm.,
- Bell, Kenneth G.; Rogers, Allen S., 1950, Experimental gamma-ray logging of drill holes in the Calamity area, Mesa County, Colorado: Trace Elements Investigations 84, 11 p.: log folios, maps,
- Bennison, Allan P.; Milton, Charles, 1950, Notes to accompany preliminary geologic map of Fairfax, Virginia and (part) Seneca, Virginia-Maryland quadrangles: Open-File Report 50-11, 1 leaf : map ; 53 x 45 cm.,
- Berry, D. W., 1950, Ground-water data collected in the Missouri River Basin Units in Kansas during 1948: Open-File Report 50-54, 188 p., 13 figs.,
- Berry, Delmar W., 1950, Ground-water data collected in the Missouri River Basin Units in Kansas during 1949: Open-File Report 50-55, 121 p., 12 figs,
- Berryhill, Henry L.; Brown, Donald M.; Brown, Andrew; Taylor, Dorothy A., 1950, Coal resources of Wyoming: [U.S. Geological Survey], Circular 81, iv, 78 p. :illus. ;27 cm.,
- Bodenlos, Alfred J., 1950, Magnesite deposits of central Ceara, Brazil: U.S. Govt. Print. Off., Bulletin 962-C, p.121-153, 1 leaf of plates :maps (5 fold in pocket) ;24 cm.,
- Bradley, Wilmot H., 1950, Sediments and physical environment of the Sagadahoc Bay tidal flat, Georgetown, Maine: U.S. Geological Survey], Open-File Report 50-29, 23 p. ill., folded map ;28 cm.,
- Bramlette, M. N., 1950, The bauxite possibilities of Cuba: U.S. Geological Survey], Open-File Report 50-30, 5 p.;27 cm.,
- Brashears, M. L., Jr., 1950, Ground-water conditions in the vicinity of the Veterans Hospital, Castle Point, Dutchess County, New York: Open-File Report 50-1, 12 p., 1 fig.,
- Brashears, M. L., Jr., 1950, The piezometric surface of the Lloyd sand member of the Raritan formation, Long Island, New York, in 1947: Open-File Report 50-58, 3 plates; 1 map; 1 table,
- Brashears, M. L., Jr., 1950, Average daily withdrawals of water for public supply in Kings, Queens, and Nassau Counties, New York: Open-File Report 50-59, 1 p., 2 figs., 2 tables,
- Brashears, M. L., Jr., 1950, Ground-water conditions at the Veterans Facility, Castle Point, New York: Open-File Report 50-60, 5 p., 1 fig.,
- Brashears, M. L., Jr., 1950, Cooperative ground-water investigations in Massachusetts by the United States Geological Survey, 1938-50: Open-File Report 50-61, 9 p., 1 fig.,
- Bressler, Calder Tupper, 1950, Garnet deposits near Wrangell, southeastern Alaska: U. S. Govt. Print. Off., Bulletin 963-C, p. 81-93 :maps (2 fold. in pocket) ;24 cm.,
- Broadhurst, W. L.; Breeding, S. D., 1950, Ground-water resources of Gregg County, Texas, with a section on Stream runoff: U.S. G.P.O, Water Supply Paper 1079-B, iv, 63-105 p. :ill., maps ;24 cm.,
- Broadhurst, W. L.; Ellsworth, C. E., 1950, Supplementary report on surface-water and ground-water surveys, Nueces Ruver Basin, Texas: Open-File Report 50-62, 9 p.,
- Broadhurst, W. L.; Sundstrom, R. W.; Rowley, J. H., 1950, Public water supplies in southern Texas: U.S. G.P.O., Water Supply Paper 1070, 113 p. :ill., map ;24 cm.,
- Brown, Roland W., 1950, Cretaceous plants from southwestern Colorado: Professional Paper 221-D, p. 45-66,
- Buddington, A. F.; Leonard, B. F., 1950, Aeromagnetic and geologic maps of quadrangles in the Adirondack area: Open-File Report 50-114, 1:62500,
- Busch, E. A., 1950, A list of references on the occurrence, availability, and character of ground water in the Missouri River Basin: Open-File Report 50-63, 109 p.,
- Byrne, Frank E.; Beck, Henry V.; Bearman, Charles H.; Matthews, Claude W., 1950, Construction materials in Decatur County, Kansas: [U.S. Geological Survey], Circular 40, ii, 11 p. :illus., fold. map (in pocket) ;27cm.,
- Byrne, Frank E.; Beck, Henry V.; Coombs, Vincent B.; Johnson, Wwndell B., 1950, Geologic construction-material resources in Republic County, Kansas: [U.S. Geological Survey], Circular 79, ii, 20 p. :ill. ;27 cm.,
- Byrne, Frank E.; Houston, Max S.; Mudge, Melville R., 1950, Construction materials in Jewell County, Kansas: [U.S. Geological Survey], Circular 38, ii 21 p. :maps (1 fold., in pocket) diagrs. ;27cm.,
- Callaghan, Eugene, 1950, Geologic map of the Marysvale area, Utah: Open-File Report 50-17, 1 map,
- Carr, Martha S., 1950, The District of Columbia; its rocks and their geologic history: U.S. G.P.O., Bulletin 967, 5 maps :some col. ;73 x 72 cm. or smaller, on sheets 81 x 81 cm. or smaller, folded in cover 24 x 15 cm. +1 text (v, 59 p. : ill., maps (some folded) ; 24 cm.,
- Castle, Robert O., 1950, Surficial geologic map of parts of Billerica, Wilmington, and Lexington quadrangles, Massachusetts: Open-File Report 50-31, 1 map,
- Cater, F. W.; Craig, L. C.; Phoenix, D. A., 1950, Progress of geologic studies, Colorado Plateau Project: Trace Elements Investigations 110, 41 p.; 6 illus.,
- Cederstrom, D. J.; Wahrhaftig, Clyde; Barnes, F. F., 1950, Ground water in the vicinity of Healy and Homer, Alaska: Open-File Report 50-64, 5 p., 1 map,
- Cederstrom, Dagfin John, 1950, Geology and ground-water resources of St. Croix, Virgin Islands: U. S. Govt. Print. Off., Water Supply Paper 1067, vi, 117 p. :ill., maps (1 fold., in pocket) ;24 cm.,
- Chute, Newton Earl, 1950, Bedrock geology of the Brockton quadrangle, Massachusetts: Geologic Quadrangle 5, 1 map.,
- Chute, Newton Earl, 1950, Brockton, Massachusetts Surficial geology: Geologic Quadrangle 6, 1 map.,
- Clabaugh, Stephen Edmund; Armstrong, F. C., 1950, Corundum deposits of Gallatin and Madison Counties, Montana: U.S. Govt. Print. Off., Bulletin 969-B, p. 29-53, ill., maps (in pocket) ;24 cm.,
- Coats, R. R., 1950, Volcanic activity in the Aleutian arc: Bulletin 974-B, 14 p.,
- Cobb, Edward Huntington, 1950, Coal investigations on the southwest margin of the Homer district, Kenai coal field, Alaska: U.S. Geological Survey], Open-File Report 50-32, 11 p. folded map ;27 cm.,
- Cohee, George Vincent; Burns, R. N.; Brown, Andrew; Brant, R. A.; Wright, Dorothy., 1950, Coal resources of Michigan: United States Dept. of the Interior Geological Survey, Circular 77, 56 p. :maps (1 folded) ;28 cm.,
- Cole, W. Storrs, 1950, Larger Foraminifera from the Palau Islands: Professional Paper 221-B, p. 21-31,
- Combo, John Xavier; Holmes, Clifford N.; Christner, H. Reed, 1950, Map showing coal resources of Montana: Coal Map 2, 1 map on 2 sheets :col. ;194 x 97 cm., on sheets 117 x 105 cm.,
- Conant, L. C.; Brown, Andrew; Hass, W. H., 1950, Chattanooga shale of the Eastern Highland Rim, Tennessee: Trace Elements Investigations 62, 94 p., 13 plates [some missing], 6 fig.,
- Conover, C. S., 1950, Ground-water conditions in the Rincon and Mesilla Valleys and adjacent areas in New Mexico: Open-File Report 50-66, 316 p., 11 pls., 12 figs.,
- Cooper, John Roberts, 1950, Western Molybdenum Company mine, Chewelah district, Stevens County, Washington: s.n., Open-File Report 50-20, 12 p.; 7 folded maps ;27 cm.,
- Currier, Louis W., 1950, Map showing status of geologic mapping and investigations in Massachusetts and Rhode Island under cooperative programs: Open-File Report 50-21, 1 map.,
- Cushman, R. V., 1950, Bibliography of publications relating to ground water in Connecticut: Open-File Report 50-67, 12 p., 1 map,
- Darton, N. H., 1950, Configuration of the bedrock surface of the District of Columbia and vicinity: Professional Paper 217, 42 p.,
- Dempsey, William J., 1950, Five preliminary aeromagnetic maps of Pottsville and vicinity, Mullan and vicinity, Wallace and vicinity, Smelterville and vicinity, and Kellogg and vicinity, all in the Coeur d‘Alene mining district, Idaho: Open-File Report 50-8, 5 maps,
- Dempsey, William J.; Duffner, R. T.; Keller, Fred, Jr.; Henderson, J. R., Jr., 1950, Total intensity aeromagnetic map, Bonne Terre quadrangle, Missouri: Geophysical Investigation Map 14, 1 map.,
- Dempsey, William J.; Duffner, R. T.; Keller, Fred, Jr.; Hnederson, J. R., Jr., 1950, Total intensity aeromagnetic map, Potosi quadrangle, Missouri: Geophysical Investigation Map 13, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Carroll County, Indiana: Geophysical Investigation Map 22, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, De Kalb County, Indiana: Geophysical Investigation Map 23, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Howard County, Indiana: Geophysical Investigation Map 24, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Huntington County, Indiana: Geophysical Investigation Map 25, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Kosciusko County, Indiana: Geophysical Investigation Map 26, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Lagrange County, Indiana: Geophysical Investigation Map 27, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Miami County, Indiana: Geophysical Investigation Map 28, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Noble County, Indiana: Geophysical Investigation Map 29, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Porter County, Indiana: Geophysical Investigation Map 30, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Steuben County, Indiana: Geophysical Investigation Map 31, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Wabash County, Indiana: Geophysical Investigation Map 32, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Wells County, Indiana: Geophysical Investigation Map 33, 1 map.,
- Dempsey, William J.; Henderson, John R., Jr.; Duffner, R. T., 1950, Total intensity aeromagnetic map, Whitley County, Indiana: Geophysical Investigation Map 34, 1 map.,
- Dempsey, William J.; Hill, M. E., 1950, Total intensity aeromagnetic map, parts of Guadalupe and De Baca Counties, New Mexico (R. 21 E.-R. 26 E. and T. 3 N.-T. 6 N.): Geophysical Investigation Map 15, 1 map.,
- Dempsey, William J.; Hill, M. E., 1950, Total intensity aeromagnetic map, parts of Guadalupe and De Baca Counties, New Mexico (R. 16 E.-R. 21 E. and T. 3 N.-T. 6 N.): Geophysical Investigation Map 16, 1 map.,
- Dempsey, William J.; Hill, M. E., 1950, Total intensity aeromagnetic map, parts of San Miguel and Guadalupe Counties, New Mexico (R. 21 E.-R. 25 E. and T. 6 N.-T. 12 N.): Geophysical Investigation Map 17, 1 map.,
- Dempsey, William J.; Hill, M. E., 1950, Total intensity aeromagnetic map, parts of San Miguel and Guadalupe Counties, New Mexico (R. 16 E.-R. 21 E. and T. 6 N.-T. 10 N. and part of Anton Chico grant): Geophysical Investigation Map 18, 1 map.,
- Dennis, P. E., 1950, Geology and ground-water hydrology of the Lake Hefner area in Oklahoma County, Oklahoma: Open-File Report 50-68, 19 p., 2 figs.,
- Denson, Norman M., 1950, The lignite deposits of the Cheyenne River and Standing Rock Indian reservations, Corson, Dewey, and Ziebach counties, South Dakota, and Sioux County, North Dakota: [U.S. Geological Survey], Circular 78, 22 p. :ill., maps (1 folded) ;27 cm.,
- Dobrovolny, Ernest; Miller, Robert D., 1950, Descriptive geology of Anchorage and vicinity, Alaska: U.S. G.P.O., Open-File Report 50-25, 15 p.; 4 charts, 2 folded maps ;29 cm.,
- Donnell, John Roswell; Cashion, W. B.; Zilbersher, W. M.; Gibson, W. C.; Wolman, M. G., 1950, Stratigraphic sections of the oil shale deposits in the western part of the Piceance Creek Basin, Garfield and Rio Blanco Counties, Colorado: U.S. Geological Survey], Open-File Report 50-16, [1 v.] :ill. ;29 cm.,
- Dover, T. B., 1950, Mineral constituents in water and their significance: Open-File Report 50-69, 6 p.,
- Duncan, D. C.; Belser, Carl, 1950, Geology of the eastern part of the Piceance Creek basin, Rio Blanco and Garfield Counties, Colorado: Oil and Gas Investigation Map 119, -,
- Duncan, Donald Cave; Belser, Carl, 1950, Geology and oil shale resources of the eastern side of the Piceance Creek Basin, Rio Blanco and Garfield counties, Colorado: [U.S. Geological Survey], Open-File Report 50-12, 17 p. ill. (some folded), 2 folded maps ;29 cm.,
- Dutton, Carl E., 1950, Progress of geologic work in Iron and Dickinson Counties, Michigan: [U.S. Geological Survey], Circular 84, i, 7 p. :maps ;27 cm.,
- Eakin, T. E.; Robinson, T. W., 1950, Ground-water conditions in Whiskey Flat, Mineral County, Nevada: Open-File Report 50-70, 6 p.,
- Eargle, D. H., 1950, Geologic map of the Selma group in eastern Alabama: Oil and Gas Investigation Map 105, 1 map :col. ;34 x 61 cm. on sheet 98 x 106 cm.,
- Eddy, G. E.; Ferris, J. G., 1950, Relation of ground water to stream flow at Battle Creek, Michigan: Open-File Report 50-71, 2 p.,
- Ferris, J. G., 1950, Probable effects on ground-water resources from construction of the proposed Grand River cut-off channel west of Lansing, Michigan: Open-File Report 50-72, 6 p.,
- Fleischer, Michael, 1950, An introduction to the geochemistry of gadolinium: Trace Elements Investigations 128, 13 leaves : ill. ; 27 cm.,
- Fletcher, Mary H.; May, Irving, 1950, An improved fluorimeter for the determination of uranium in fluoride melts: Open-File Report 50-33, 10 p.; 6 leaves of plates : ill. ; 29 cm.,
- Fletcher, Mary H.; May, Irving; Slavin, Morris, 1950, A transmission fluorimeter for use in the fluorimetric method of analysis for uranium: Open-File Report 50-34, 14 p.: ill. ; 29 cm.,
- Fletcher, Mary Henry, 1950, A study of critical factors in the "direct" fluorimetric determination of uranium: Trace Elements Investigations 130, 40 p. : ill. ; 28 cm.,
- Frondel, Judith Weiss; Fleischer, Michael, 1950, A glossary of uranium- and thorium-bearing minerals: U.S. Dept. of the Interior, Geological Survey, Circular 74, 20 p. ;27 cm.,
- Frondel, Judith Weiss; Fleischer, Michael, 1950, A glossary of Uranium- and Thorium- bearing minerals: Trace Elements Investigations 103, 32 p.,
- Gardner, Julia, 1950, The molluscan fauna of the Alum Bluff group of Florida, Part IX, Index to chapters A-H: Professional Paper 142-I, p. 657-709,
- Gardner, L. S., 1950, Geology of the Button Butte-Forestgrove area, Fergus County, Montana: Oil and Gas Investigation Map 106, 1 map.,
- Gatewood, Joseph S.; Robinson, T. W.; Colby, B. R.; Hem, J. D.; Halpenny, L. C., 1950, Use of water by bottom-land vegetation in lower Safford Valley, Arizona: U.S. G.P.O., Water Supply Paper 1103, xiv, 210 p. :ill. ;24 cm. + plates folded in pocket.,
- Geological Survey (U.S.), 1950, Index of surface-water records, part 11, Pacific slope basins in California, to September 30, 1948: U.S. Dept. of the Interior, Geological Survey, Circular 72, 24 p. ;27 cm.,
- Geological Survey (U.S.), 1950, Topographic instructions, Book 1, Part 1-A, Preface and contents: The Division, Circular 92, 16 p. ;27 cm.,
- Geological Survey (U.S.), 1950, Characteristics of radioactive carbonaceous and bituminous shales: Trace Elements Investigations 78, 23 p., 4 fig. [missing],
- Geological Survey (U.S.), 1950, Water levels and artesian pressure in observation wells in the United States, 1946, Part 2, Southeastern States: U.S. Govt. Print. Off., Water Supply Paper 1072, vi, 272 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part I, North Atlantic slope basins: U.S. Govt. Print. Off., Water Supply Paper 1081, xiii, 682 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part II, South Atlantic slope and eastern Gulf of Mexico basins: U.S. Govt. Print. Off., Water Supply Paper 1082, xi, 544 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part III, Ohio River basin: U.S. Govt. Print. Off., Water Supply Paper 1083, xiii, 722 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part IV, St. Lawrence River basin: U.S. Govt. Print. Off., Water Supply Paper 1084, viii, 288 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part V, Hudson Bay and upper Mississippi River basins: U.S. Govt. Print. Off., Water Supply Paper 1085, xii, 479 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part VI, Missouri River basin: U.S. Govt. Print. Off., Water Supply Paper 1086, xiii, 659 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part VIII, Western Gulf of Mexico basins: U.S. Govt. Print. Off., Water Supply Paper 1088, ix, 336 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part XII, Pacific slope basins in Washington and upper Columbia River basin: U.S. Govt. Print. Off., Water Supply Paper 1092, ix, 349 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part XIII, Snake River basin: Govt. Print. Off., Water Supply Paper 1093, viii, 269 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1947, Part XIV, Pacific slope basins in Oregon and lower Columbia River basin: U.S. Govt. Print. Off., Water Supply Paper 1094, viii, 275 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of Hawaii, 1946-47: U.S. G.P.O., Water Supply Paper 1095, vi, 130 p. ;24 cm.,
- Geological Survey (U.S.), 1950, Water levels and artesian pressure in observation wells in the United States, 1947, Part 4, South-Central States: U.S. Govt. Print. Off., Water Supply Paper 1099, vi, 201 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part IV, St. Lawrence River basin: U.S. Govt. Print. Off., Water Supply Paper 1114, viii, 296 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part V, Hudson Bay and upper Mississippi River basins: U.S. Govt. Print. Off., Water Supply Paper 1115, xi, 464 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part VII, Lower Mississippi River basin: U.S. Govt. Print. Off., Water Supply Paper 1117, ix, 418 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part VIII, Western Gulf of Mexico basins: U.S. Govt. Print. Off., Water Supply Paper 1118, ix, 371 p. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part IX, Colorado River basin: U.S. Govt. Print. Off., Water Supply Paper 1119, ix, 421 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part X, The Great Basin: U.S. Govt. Print. Off., Water Supply Paper 1120, vii, 216 p. :ill. ;23 cm.,
- Geological Survey (U.S.), 1950, Surface water supply of the United States, 1948, Part XI, Pacific slope basins in California: U.S. Govt. Print. Off., Water Supply Paper 1121, xi, 449 p. :ill. ;23 cm.,
- Gott, Garland Bayard, 1950, Uranium-bearing black shales and stylolite fillings in Spergen limestone, Bussen‘s quarry, Ste. Genevieve, Missouri: Trace Elements Memorandum 28, 11 p. : ill., map ; 29 cm.; 2 figs, 2 tables,
- Graham, J. B., 1950, Contour map showing altitude of bedrock surface in southern Philadelphia, Pennsylvania: Open-File Report 50-73, 1 map,
- Granger, Harry Clifford; Bauer, Herman Louis, 1950, The Eureka and happy landing (Cooper-Sands) groups of claims, Uintah County, Utah : a preliminary report: Trace Elements Memorandum 32, 31 p. : 29 cm.; 8 figs (2 in envelope); 3 tables,
- Granger, Harry Clifford; Beroni, E. P., 1950, Uranium occurrence in the White Canyon area, Utah: Trace Elements Memorandum 7, 32 p. : ill., maps; 5 figs (3 in pocket); 2 tables,
- Granger, Harry Clifford; Beroni, Ernest P., 1950, Cook Property, Jefferson County, Colorado: Trace Elements Memorandum 20, 6 p. : maps ; 29 cm,
- Gregory, Herbert E., 1950, Geology and geography of the Zion Park region, Utah and Arizona: Professional Paper 220, 200 p.,
- Grimaldi, F. S.; Guttag, Norma S., 1950, Short routine direct method for the fluorimetric determination of uranium in phosphate rocks: Trace Elements Investigations 134, 8 leaves : ill. ; 29 cm.,
- Grimaldi, F. S.; Levine, Harry, 1950, The fluorometirc determination of aluminum in phosphate rock with 8-hydroxyquinoline: Trace Elements Investigations 60, 13 p., 5 fig.,
- Guyton, W. F., 1950, Estimated use of ground water in the United States, 1945: Open-File Report 50-74, 5 p.; 7 figs.; tables included in Circular 117,
- Halpenny, L. C., 1950, Memorandum on results of well drilling at Kayenta, Navajo Indian Reservation, Navajo County, Arizona: Open-File Report 50-3, 4 p.,
- Halpenny, L. C.; Harshbarger, J. W.; Hem, J. D., 1950, Water-supply investigation of Sanastee area, Navajo Indian Reservation, San Juan County, New Mexico: Open-File Report 50-75, 26 p., 1 plate, 2 figs.,
- Hanley, J. B.; Heinrich, E. W.; Page, L. R., 1950, Pegmatite investigations in Colorado, Wyoming, and Utah, 1942-1944: Professional Paper 227, 125 p.,
- Havelka, D. E., 1950, Delivery of water in the Brazos River from Possum Kingdom Reservoir to Richmond, Texas, during August and September 1948: Open-File Report 50-76, 3 p., 2 plates,
- Hawkins, Harold Horatio; Richard, R. W., 1950, Geologic investigation at the site of the Post Office Building, Welch, West Virginia: [U.S. Geological Survey], Open-File Report 50-36, 22 p. ill., map, photos. ;29 cm.,
- Hebert, Remy; translated by Britt, S. E., 1950, Contribution to the study of the physico-chemical structure of clays: U.S. Geological Survey], Open-File Report 54-28, 45 p. ;29 cm.,
- Hem, John David, 1950, Quality of water of the Gila River basin above Coolidge Dam, Arizona: U.S. Govt. Print. Off., Water Supply Paper 1104, vi,230 p. :2 fold. maps (in pocket) diagrs., tables. ;23 cm.,
- Henderson, John R., 1950, Ten preliminary aeromagnetic maps covering Clark, Floyd, Hamilton, Hancock, Harrison, Jackson, Jefferson, Madison, Tipton, and Washington Counties, Indiana: Open-File Report 50-37, 10 maps.,
- Henderson, John R., 1950, Two preliminary aeromagnetic maps covering Johnson and Marion Counties, Indiana: Open-File Report 50-38, 2 maps.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Pike County, Indiana: Geophysical Investigation Map 10, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Spencer County, Indiana: Geophysical Investigation Map 11, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map of Warrick County, Indiana: Geophysical Investigation Map 12, 1 map ;80 x 70 cm.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Adams County, Indiana: Geophysical Investigation Map 20, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Allen County, Indiana: Geophysical Investigation Map 21, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Boone County, Indiana: Geophysical Investigation Map 35, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Clinton County, Indiana: Geophysical Investigation Map 36, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Gibson County, Indiana: Geophysical Investigation Map 37, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Hendricks County, Indiana: Geophysical Investigation Map 38, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Montgomery County, Indiana: Geophysical Investigation Map 39, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Perry County, Indiana: Geophysical Investigation Map 40, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Putnam County, Indiana: Geophysical Investigation Map 41, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Tippecanoe County, Indiana: Geophysical Investigation Map 42, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map of Vanderburgh County, Indiana: Geophysical Investigation Map 43, 1 map ;77 x 56 cm.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Vermillion County, Indiana: Geophysical Investigation Map 44, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Warren County, Indiana: Geophysical Investigation Map 45, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Daviess County, Indiana: Geophysical Investigation Map 7, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Dubois County, Indiana: Geophysical Investigation Map 8, 1 map.,
- Henderson, John R., Jr.; Meuschke, J. L., 1950, Total intensity aeromagnetic map, Martin County, Indiana: Geophysical Investigation Map 9, 1 map.,
- Hendricks, T. A.; Parks, Bryan, 1950, Geology of the Fort Smith district, Arkansas: Professional Paper 221-E, p. 67-94,
- Hershey, H. G., 1950, Some aspects of the ground-water future in Iowa: Open-File Report 50-77, 23 p.,
- Heyl, Allen V., Jr., 1950, The upper Mississippi Valley zinc-lead district; In two parts: I General structural relations of the upper Mississippi Valley zinc-lead district. II. The ore deposits of the upper Mississippi Valley zinc-lead district: Open-File Report 50-13, 271 p., 2 maps,
- Heyl, Allen Van, Jr.; Lyons, Erwin J.; Theiler, John J., 1950, Lead and zinc deposits of the Beetown area, Wisconsin: U.S. Geological Survey, Open-File Report 50-39, 17 p.; folded map ;27 cm.,
- Hobbs, S. W.; Wallace, R. E.; Griggs, Allan Bingham, 1950, Geology of the southern third of the Mullan and Pottsville quadrangles, Shoshone County, Idaho: U.S. Geological Survey], Open-File Report 50-40, 24 p.; folded map ;27 cm.,
- Hotz, Preston Enslow, 1950, Diamond-drill exploration of the Dillsburg magnetite deposits, York County, Pennsylvania: U.S. Govt. Print. Off., Bulletin 969-A, iv, p. 1-27, ill., maps (in pocket) ;24 cm.,
- Hough, Jean, 1950, The habits and adaptation of the Oligocene saber tooth carnivore, Hoplophoneus: Professional Paper 221-H, p. 125-146,
- Hunt, Charles B.; Sokoloff, V. P., 1950, Pre-Wisconsin soil in the Rocky Mountain region; a progress report: Professional Paper 221-G, p. 109-123,
- Irelan, Burdge, 1950, Chemical composition of Texas surface waters, 1949: Open-File Report 50-78, 67 p.,
- Jaffe, Elizabeth B., 1950, Abstracts of the literature on synthesis of apatites and some related phosphates, Part I and Part II: Trace Elements Investigations 132, 86 p. : ill. ; 29 cm.,
- Jahns, Richard H.; Lancaster, Forrest W., 1950, Physical characteristics of commercial sheet muscovite in the southeastern United States: Professional Paper 225, 110 p.,
- Johnson, Arthur, 1950, Reconnaissance of Lake Chackachamna, Alaska: Open-File Report 50-112, i, 8 leaves :ill. ;29 cm.,
- Johnson, Frederick A., 1950, Some reservoir sites in the Sierra Nevada, California: [U.S. Geological Survey], Circular 85, 28 p. :map ;27 cm.,
- Johnston, John Edward; Heck, W. E., 1950, The Fire Clay and Whitesburg coals in the Hyden quadrangle, Leslie, Clay, and Perry Counties, Kentucky: Coal Map 5, 1 map.,
- Jones, P. H., 1950, Memorandum on ground-water conditions in the Huachipato-Talcahuano area near Concepcion, Chile: Open-File Report 50-79, 5 p., 1 plate, 5 figs.,
- Kent, Deane Frederick, 1950, Techniques used in mine-water problems of the east Tennessee zinc district: [U.S. Geological Survey], Circular 71, 9 p. :ill. ;27 cm.,
- Kesler, Thomas L., 1950, Geology and mineral deposits of the Cartersville district, Georgia: Professional Paper 224, 97 p.,
- Killeen, P. L.; White, M. G., 1950, Short contributions to Alaskan trace element studies 1946 : Part II: Trace elements reconnaissance of the South Fork of Quartz Creek, northeastern Seward Peninsula, Alaska: Trace Elements Investigations 42-2, 21 p., 1 fig.,
- King, Philip B., 1950, Geology of the Elkton area, Virginia: Professional Paper 230, 82 p.,
- King, Philip Burke; Hayes, C. W., 1950, Geologic map of Murphy quadrangle, Tennessee-North Carolina: Open-File Report 50-2, 1 map,
- King, Robert U.; Granger, Harry Clifford, 1950, Torbernite occurrence at the Robineau claims, Clear Creek County, Colorado: Trace Elements Memorandum 24, 11 p. : map ; 29 cm.,
- King, Robert Ugstad, 1950, A radiometric traverse at the Apex Claims (Bates Creek), Gilpin County, Colorado: Trace Elements Memorandum 22, 5 p. : ill., map ; 29 cm.; 1 table,
- Klepper, M. R., 1950, Forty-Niner, King Solomon Ridge, and West End claims near Clancy in Jefferson County, Montana: Trace Elements Memorandum 31, 8 p.; 1 map,
- Klepper, Montis Ruhl, 1950, A geologic reconnaissance of parts of Beaverhead and Madison Counties, Montana: Geological Survey (U.S.) Bulletin 969-C, p. 55-85, 24 cm. **DJVU MISSING PAGES 82 & 83**,
- Klepper, Montis Ruhl, 1950, Forty-niner, King Solomon Ridge, and West End claims near Clancy, Jefferson County, Montana: Open-File Report 51-23, 3 p.: 1 map ; 27 cm.,
- Koschmann, Albert Herbert, 1950, Geologic maps of lead-zinc mines, Kokomo district, Summit County, Colorado: Open-File Report 50-19, 13 maps,
- Koschmann, Albert Herbert; Gordon, Mackenzie, Jr., 1950, Geology and mineral resources of the Maimon-Hatillo district, Dominican Republic: U. S. Govt. Print. Off., Bulletin 964-D, v, p.307-359, maps (2 fold. in pocket) ;24 cm.,
- La Rocque, G. A.; Upson, J. E.; Worts, G. F.; Porter, L., 1950, Wells and water levels in principal ground-water basins in Santa Barbara County, California: Part 1, Carpinteria, Goleta, and Santa Ynez Valleys, 1930-41; Part 2, San Antonio, Santa Maria, and Cuyama Valleys, 1920-41: U.S. G.P.O., Water Supply Paper 1068, v, 459 p. :ill., maps ;24 cm. + plates folded in pocket.,
- Lamey, Carl A., 1950, The Blewett iron-nickel deposit, Chelan County, Washington: U.S. Govt. Print. Off., Bulletin 969-D, p. 87-103, ill., maps ;24 cm.,
- Lawrence, F. F., 1950, Water power resources of Scenery Creek near Petersburg, Alaska: Open-File Report 50-113, 32 p.,
- LeFever, F. L.; Martin, R. O. R.; Bennett, R. R.; Otton, E. G., 1950, Water resources of the Cumberland area, Maryland-West Virginia: Open-File Report 50-80, 18 p.,
- Leatherock, Constance, 1950, Subsurface stratigraphy of Paleozoic rocks in southeastern Montana and adjacent parts of Wyoming and South Dakota: Oil and Gas Investigation Chart 40, 1 map.,
- Littleton, Robert T.; section by Swenson, Herbert A., 1950, Ground-water conditions in the vicinity of Gillette, Wyoming, with a section on the quality of ground waters: U.S. Dept. of the Interior, Geological Survey, Circular 76, iv, 43 p. :ill. ;27 cm.,
- Littleton, Robert Thomas, 1950, Reconnaissance of the ground-water resources of the Wheatland Flats area, Wyoming: [U.S. Geological Survey], Circular 70, 32 p. :ill., maps ;27 cm.,
- Littleton, Robert Thomas, 1950, Reconnaissance of the geology and ground-water hydrology of the Laramie Basin, Wyoming, with special reference to the Laramie and Little Laramie River valleys: [U.S. Geological Survey], Circular 80, iv, 37 p. :ill., 2 maps ;27 cm.,
- Lohman, S. W., 1950, The relation of ground water to irrigation: Open-File Report 50-81, 9 p.,
- Lovering, T. S.; Goddard, E. N., 1950, Geology and ore deposits of the Front Range, Colorado: Professional Paper 223, 319 p.; 28 plates.,
- Lovering, Thomas Seward; Tweto, Ogden L., 1950, Mine maps of Boulder tungsten district, Colorado: Open-File Report 50-41, 110 maps,
- Lusczynski, N. J., 1950, Salinity of ground water at sampling wells located in southeastern Nassau County, Long Island, New York: Open-File Report 50-82, 3 p.,
- Lusczynski, N. J., 1950, Withdrawal of ground water and pond water on Long Island from 1904 to 1949: Open-File Report 50-83, 3 p., 1 fig.,
- Lusczynski, N. J., 1950, Piezometric levels from 1948 through 1950 for wells screened in the Lloyd sand member of the Raritan formation on Long Island, New York: Open-File Report 50-84, 10 p.,
- MacNeil, F. Stearns, 1950, Pleistocene shore lines in Florida and Georgia: Professional Paper 221-F, p. 95-107,
- Macdonald, G. A.; Orr, J. B., 1950, The 1949 summit eruption of Mauna Loa, Hawaii: Bulletin 974-A, 33 p.,
- Maher, John Charles, 1950, Detailed sections of pre-Pennsylvanian rocks along the Front Range of Colorado: [U.S. Geological Survey], Circular 68, ii, 20 p. :map. ;27 cm.,
- Maher, John Charles, 1950, Pre-Pennsylvanian rocks along the Front Range of Colorado: Oil and Gas Investigation Chart 39, 3 cross sections on 1 sheet ;sheet 91 x 135 cm.,
- May, Irving.; Fletcher, Mary H., 1950, A battery-powered fluorimeter for the determination of uranium: Trace Elements Investigations 135, 9 leaves, [5] leaves of plates : ill. ; 29 cm.,
- Maynard, James E.; Linehan, Rev. Daniel, 1950, Geologic interpretations of seismic data for various locations in Braintree and Danvers, Massachusetts: Open-File Report 50-42, 5 p.,
- Maynard, James E.; Linehan, Rev. Daniel, 1950, Geologic interpretations of seismic data for various locations in Wakefield, Danvers, Shelburne and Sturbridge, Massachusetts: Open-File Report 50-43, 13 p.,
- Maynard, James E.; Linehan, Rev. Daniel, 1950, Geologic interpretation of seismic data, Lancaster, Massachusetts, relocation of Route 2, Stations 138-155: Open-File Report 50-44, 4 p.,
- Maynard, James E.; Linehan, Rev. Daniel, 1950, Geologic interpretation of seismic data, Topsfield, Massachusetts, relocation of Route 1, Stations 25-36: Open-File Report 50-45, 5 p.,
- Maynard, James E.; Linehan, Rev. Daniel, 1950, Geologic interpretation of seismic data for various locations in Harvard and Topsfield, Masachusetts: Open-File Report 50-46, 9 p.,
- McAllister, James Franklin; Flores Williams, Hector; Ruiz, Carlos F., 1950, Quicksilver deposits of Chile: U.S. Govt. Print. Off., Bulletin 964-E, p. 361-400, maps (11 fold. in pocket) ;24 cm.,
- McKelvey, V. F., 1950, Relation of uranium and phosphate in the Phosphoria formation: Trace Elements Investigations 77, 47 p., 21 fig.,
- McKelvey, Vincent Ellis, 1950, Potential by-product elements in the Phosphoria formation of the Western States: Trace Elements Investigations 131, 9 leaves ; 27 cm.,
- Meuschke, J. L., 1950, Nine preliminary aeromagnetic maps covering Aitkin County and parts of Itasca, Kanabec, Koochiching, Mille Lacs, Pine, and St. Louis Counties, Minnesota: Open-File Report 50-47, 9 maps.,
- Meuschke, J. L., 1950, Three preliminary aeromagnetic maps of eastern St. Louis County, Minnesota: Open-File Report 50-48, 3 maps.,
- Miller, Ralph L.; Brosge, William Peters, 1950, Geology of the Jonesville district, Lee County, Virginia: Oil and Gas Investigation Map 104, 1 map. (See also Bulletin 990),
- Moffit, Fred Howard; Fellows, Robert E., 1950, Copper deposits of the Prince William Sound district, Alaska: U.S. Govt. Print. Off., Bulletin 963-B, iv, p. 47-80, maps (part in pocket) ;24 cm.,
- Morris, D. A.; Durum, W. H., 1950, Progress report on the geology and ground-water hydrology of the Riverton Irrigation Project, Wyoming: Open-File Report 50-85, 108 p., 4 plates, 12 figs.,
- Moxham, R. M., 1950, Trace elements reconnaissance of the southern highway belt, south-central Alska: Trace Elements Investigations 48, 17 p., 2 fig.,
- Moxham, R. M., 1950, The occurrence of zeunerite in the Russian mountains, Alaska : interim report [Part 4]: Trace Elements Investigations 57-D, 9 p., 1 fig.,
- Moxham, Robert Morgan; Nelson, Arthur Edward, 1950, Trace elements reconnaissance in the Jakolof Bay area, southern Alaska: Trace Elements Investigations 74-A, 5 p., 1 fig.: map ; 29 cm.,
- Nace, Raymond L.; Fader, Stuart Wesley, 1950, Records of wells on Rathdrum Prairie, Bonner and Kootenai Counties, Northern Idaho: U.S. Dept. of the Interior, Geological Survey, Open-File Report 51-19, i, 50 p. :maps (fold.) ;27 cm.,
- Nelson, W. B.; Lofgren, B. E., 1950, Progress report on ground-water investigation in Ashley Valley, Uintah County, Utah: Open-File Report 50-86, 5 p., 3 figs.,
- Newcomb, R. C.; Sceva, J. E.; Stromme, Olaf, 1950, Ground-water resources of western Whatcom County, Washington: Open-File Report 50-7, 134 p.; 11 plates,
- Overbeck, R. M., 1950, Ground-water resources of the Mt. Savage area, Maryland: Open-File Report 50-87, 128 p., 1 fig.,
- Page, Lincoln Ridler, 1950, Beryllium in Colorado: Trace Elements Investigations 88, 9 p.,
- Paulsen, C. G., 1950, Water supply of the United States: Open-File Report 50-89, 4 p.,
- Paulsen, C. G., 1950, Water-resources investigations in the United States: Open-File Report 50-90, 5 p.,
- Paulsen, C. G., 1950, Quality of surface waters of the United States, 1946: U.S. G.P.O., Water Supply Paper 1050, vii, 486 p. :ill. ;24 cm.,
- Paulsen, C. G.; Hastings, W. W., 1950, Water supplies for industry: Open-File Report 50-88, 15 p., 4 figs.,
- Pecora, William Thomas; Klepper, M. R.; Larrabee, D. M.; Barbosa, A. L. M.; Frayha, Resk., 1950, Mica deposits in Minas Gerais, Brazil: U.S. Govt. Print. Off., Bulletin 964-C, vii, p. 205-305, illus., maps ;24 cm.,
- Pepper, James F.; De Witt, Wallace, Jr., 1950, Stratigraphy of the Upper Devonian Wiscoy sandstone and the equivalent Hanover shale in western and central New York: Oil and Gas Investigation Chart 37, 1 map.; 2 sheets,
- Phoenix, D. A., 1950, Ground-water in the Austin area, Lander County, Nevada: Open-File Report 50-91, 21 p.,
- Rabbitt, M. C.; Skitsky, V. L.; Vesselowsky, S. T., 1950, Geophysical abstracts 140, January-March 1950: Bulletin 976-A, 69 p.,
- Rabbitt, M. C.; Skitsky, V. L.; Vesselowsky, S. T., 1950, Geophysical abstracts 141, April-June 1950: Bulletin 976-B, 138 p.,
- Rabbitt, M. C.; Skitsky, V. L.; Vesselowsky, S. T., 1950, Geophysical abstracts 142, July-September 1950: Bulletin 976-C, 68 p.,
- Rabbitt, M. C.; Skitsky, V. L.; Vesselowsky, S. T., 1950, Geophysical abstracts 143, October-December 1950: Bulletin 976-D, 55 p.,
- Raup, Hugh Miller; Denny, Charles Storrow, 1950, Photo interpretation of the terrain along the southern part of the Alaska Highway: U.S. Govt. Print. Off., Bulletin 963-D, p.95-135, ill., maps (9 fold. col. in pocket) ; $c 24 cm.,
- Raup, Hugh Miller; Denny, Charles Storrow, 1950, Photo-interpretation of vegetation along the southern part of the Alaska Highway; its use as an indicator of the kind of ground: U.S. Geological Survey], Open-File Report 50-5, ii, 95 p., folded chart, photos ;28 cm.,
- Read, Charles Brian; Duffner, R. T.; Wood, G. H.; Zapp, A. D., 1950, Coal resources of New Mexico: [Interior Duplicating Section], Circular 89, ii, 24 p. :fold. map, tables. ;27 cm.,
- Richardson, R. M., 1950, List of references pertaining to electrical well logging: Open-File Report 50-92, 29 p.,
- Robeck, R. C.; Brown, Andrew, 1950, Black shale investigations, Block 3, Tennessee: Trace Elements Investigations 63, 42 p., 9 photographic plates,
- Roberts, C. M., 1950, Chloride content of water from wells screened in the Lloyd sand member of the Raritan formation on Long Island, New York: Open-File Report 50-93, 19 p.,
- Ross, Clyde Polhemus, 1950, Fluorspar prospects of Montana: U.S. Govt. Print. Off., Bulletin 955-E, p.173-224, ill., maps (5 fold. col. in pocket) ;24 cm.,
- Rothrock, Howard Eugene; Wagner, Holly Clyde; Haley, Boyd Raymond, 1950, Geology of anthracite in the west-central part of the Mount Carmel quadrangle, Pennsylvania: Coal Map 3, 1 map on 3 sheets.,
- Ruppel, Edward Thompson, 1950, Geology of the Limestone Hills, Broadwater County, Montana: s.n., Open-File Report 50-14, 99 p.; map, port. ;27 cm.,
- Sayre, A. N., 1950, Water resources of the United States: Open-File Report 50-95, 10 p.,
- Schlocker, Julius, 1950, Collected logs of borings in San Francisco area, a continued compilation of boring data: Open-File Report 50-49, NA,
- Segerstrom, Kenneth, 1950, Erosion studies at Paricutin, State of Michoacan, Mexico: Bulletin 965-A, 164 p.,
- Serr, Eugene Frank, 1950, Progress report, investigations of fluvial sediments of the Niobrara River near Cody, Nebraska: [U.S. Geological Survey], Circular 67, iii, 25 p. :ill. ;27 cm.,
- Sharp, William Neil, 1950, Recommendations for drilling the bastnaesite deposits, Birthday claims, San Bernardino County, California: Trace Elements Memorandum 35, 4 p. ; folded ill. in envelope,
- Siebenthal, Claude Ellsworth; Mesler, R. D., 1950, Geologic map of the Wyandotte quadrangle, northeastern Oklahoma and southwestern Missouri: Open-File Report 50-50, 1 map.,
- Sims, P. K., 1950, Geology of the Dover magnetite district, New Jersey: U.S. Geological Survey, Open-File Report 50-15, a-j, 224 p. ill., maps ;27 cm.,
- Singewald, Quentin Dreyer, 1950, Gold placers and their geologic environment in northwestern Park County, Colorado: U.S. Govt. Print. Off., Bulletin 955-D, vi, p. 103-172, illus., maps (part fold. in pocket) ;24 cm.,
- Singewald, Quentin Dreyer, 1950, Mineral resources of Colombia (other than petroleum): Government Printing Office Bulletin 964-B, Report: viii, p. 53-204; 9 Plates: 14.64 x 13.3 inches or smaller,
- Sinnott, Allen, 1950, Additional water wells at Fort Belvoir, Virginia: Open-File Report 50-96, 7 p., 2 plates,
- Smith, Ward C.; Segerstrom, Kenneth; Guiza, Reinaldo, Jr., 1950, Tin deposits of Durango, Mexico: U.S. Govt. Print. Off., Bulletin 962-D, p.155-204, ill., maps (18 fold. col.in pocket) ;24 cm.,
- Snavely, Parke Detweiler, Jr., 1950, Correlation between test holes in the Centralia-Chehalis coal district, Washington: U.S. Geological Survey, Open-File Report 50-24, 3 p; folded chart ;29 cm.,
- Sohn, I. G., 1950, Growth series of ostracodes from the Permian of Texas: Professional Paper 221-C, p. 33-44,
- Spicer, H. Cecil, 1950, Investigation of bedrock depths by electrical-resistivity methods in the Ripon-Fond du Lac area, Wisconsin: Geological Survey, Circular 69, 37 p. :illus. ;27 cm.,
- Stallman, R. W., 1950, Tables of values of W(u) for several values of u[subscript]p and K: Open-File Report 50-97, 6 p.,
- Stern, T. W., 1950, A catalog of study material of radioactive minerals: Trace Elements Investigations 129, 80 p. ; 27 cm.,
- Steven, Thomas August, 1950, Metamorphism and the origin of the granitic rocks in the Northgate district, Colorado: U.S. Geological Survey, Open-File Report 50-51, 112 p. ill., maps (2 folded) ;27 cm.,
- Stoll, W. C., 1950, Mica and beryl pegmatites in Idaho and Montana: Professional Paper 229, 64 p.,
- Straczek, J. A.; Kinney, D. M., 1950, Geologic map of the central part of the Batesville manganese district Independence and Izard Counties, Arkansas: Miscellaneous Field Studies Map 1, 1 map :col. ;50 x 95 cm.,
- Sundstrom, Raymond W.; Follett, C. R., 1950, Ground-water resources of Atascosa County, Texas: U.S. G.P.O., Water Supply Paper 1079-C, iii, 107-153 p. :ill., 1 folded map ;23 cm.,
- Swanson, Roger W., 1950, Geology of a part of the Virginia City and Eldridge quadrangles, Montana; A summary report: [s.n.], Open-File Report 51-4, 12 leaves :col. ill., col. map ;27 cm.,
- Swenson, H. A., 1950, Progress report--Chemical character of surface waters in the Devils Lake Basin, North Dakota: Open-File Report 50-98, 46 p., 4 plates, 19 figs., 15 tables,
- Thom, Emma Mertins; Hooker, Marjorie; Dunaven, R. R., 1950, Bibliography of North American geology, 1948: U.S. G.P.O., Bulletin 968, 309 p. ;24 cm.,
- Thomas, H. E., 1950, Hydrologic reconnaissance of the Green River in Utah and Colorado: Open-File Report 50-99, 92 p., 1 plate, 4 figs.,
- Thompson, George Albert, Jr., 1950, Structural geology of the Terlingua quicksilver district, Texas: s.n., Open-File Report 50-9, 93 p. ill., maps (some folded) ;27 cm.,
- Thompson, Morris Mordecai, 1950, The Twinplex: a new stereoplotting instrument: Department of the Interior Geological Survey, Circular 82, 8 p. :ill. ;27 cm.,
- Thompson, R. M.; Troyer, M. L.; White, V. L.; Pipiringos, G. N., 1950, Geology of the Lander area, central Wyoming: Oil and Gas Investigation Map 112, 1 map.,
- Thurston, R. H.; Chace, F. M., 1950, Tin, copper, and uranium at Majuba Hill, Nevada: Trace Elements Investigations 81-A, 15 p., 4 fig. ; maps,
- Thurston, W. R., 1950, Exploration of the Buckhorn Mica Pegmatite mine, Larimer County, Colorado: [U.S. Geological Survey], Open-File Report 50-22, 3 p.; 5 plans ;29 cm.,
- Trainer, Frank, 1950, Tables of well records in the Palmer-Wasilla region of the Matanuska Valley, Alaska: Open-File Report 50-100, Tables,
- translated by Sokoloff, V. P.; Hawkes, H. E., 1950, Selected Russian papers on geochemical prospecting for ores: United States Dept. of the Interior, Geological Survey, Open-File Report 48-21, v, 103 p. :ill. ;28 cm.,
- Trauger, F. D., 1950, Basic ground-water data in Lake County, Oregon: U.S. Geological Survey, Open-File Report 51-156, 287 p. (some folded) :ill., maps, plates ;28 cm.,
- Troxell, H. C.; Burgess, C. E., 1950, Second progress report on the cooperative investigation of springs and stream flow in the Tecolote Tunnel area of Santa Barbara County, California: Open-File Report 50-101, 156 p., 1 plate, 3 figs.,
- Troxell, H. C.; Poland, J. F., 1950, Some aspects of the water supply in the South Coastal Basin, California: Open-File Report 50-102, 14 p., 5 plates (to be issued as Circular 105),
- Tychsen, Paul C.; Swenson, Herbert A., 1950, Geology and ground-water hydrology of the Heart River irrigation project and the Dickinson area, North Dakota, with a section on the mineral quality of waters of the Heart River project: U.S. Dept. of the Interior, Geological Survey, Circular 34, iv, 59 p. :ill., graphs, maps (1 fold. in pocket) ;27 cm.,
- Van Houten, Franklyn B., 1950, Tertiary stratigraphy of the western part of the Beaver Divide area, Fremont County, Wyoming: Oil and Gas Investigation Map 113, 1 map.,
- Van Tuyl, D. W., 1950, Memorandum on pumping test at Ambridge, Pennsylvania: Open-File Report 50-103, 11 p., 3 figs.,
- Vhay, John Stewart, 1950, Reconnaissance examination for uranium at six mines and properties in Idaho and Montana: Trace Elements Memorandum 30, 17 p. : ill., maps (folded maps in pocket); 29 cm.; 1 table,
- Vine, James David; Hail, William James, Jr., 1950, Geology of the Hobson area, central Montana: Oil and Gas Investigation Map 108, 1 map.,
- Vorhis, R. C., 1950, Progress report on the ground-water hydrology of the Medicine Lake-Grenora area, Missouri-Souris Irrigation Project, Montana amd North Dakota: Open-File Report 50-23, 88 p.; 4 plates, 1 fig.,
- Waring, G. A.; Bush, W. H., 1950, Progress report on the geology and ground-water hydrology of part of the Oahe Unit, James River Division, South Dakota: Open-File Report 50-104, 272 p., 5 plates, 10 figs.,
- Warren, M. A., 1950, Water levels in observation wells in Santa Barbara County, California, in 1948: Open-File Report 50-105, 57 p.,
- West, W. S.; Matzko, J. J., 1950, Shorter contributions to Alaskan trace elements studies for 1947 : Part I: Radiometric and mineralogic studies of the granitic complex in the Cape Nome area, Seward Peninsula, Alaska: Trace Elements Investigations 45-2, 12 p., 1 fig.,
- Whitcomb, H. A., 1950, Geologic reconnaissance in vicinity of water well 5 miles south of Gallup, McKinley County, New Mexico: Open-File Report 50-106, 3 p.,
- Whitcomb, H. A.; Halpenny, L. C.; Hem, J. D., 1950, Water-supply investigations of the Buell Park-Sawmill area, Navajo Indian Reservation, Apache County, Arizona: Open-File Report 50-107, 26 p., 1 plate,
- Whitcomb, H. A.; Repenning, C. A., 1950, Memorandum on location of proposed well 15 miles north of Crown Point, McKinley County, New Mexico: Open-File Report 50-10, 5 p.,
- Whitcomb, H. A.; Repenning, C. A., 1950, Memorandum on geologic reconnaissance of six sites for water wells, western part of Navajo Counties, Arizona: Open-File Report 50-108, 15 p., 1 fig.,
- Whitcomb, H. A.; Repenning, C. A., 1950, Memorandum on possibility of developing ground water for irrigation along Toc Chinlin Wash near Emmanuel Mission, Navajo Indian Reservation, Apache County, Arizona: Open-File Report 50-109, 3 p.,
- White, M. G., 1950, Trace elements reconnaissance in the lower Colleen River valley, upper Yukon Division, Alaska [Part 2]: Trace Elements Investigations 57-B, 5 p., 1 fig.,
- White, M. G.; Killeen, P. L., 1950, Shorter contributions to Alaskan trace elements studies for 1947 : Part I: Radioactivity and mineralogy of concentrates from the placers of Julian, Moore, and Candle Creeks, and the Cripple Creek Mountains, lower Yukon-Kuskokwim Highlands region, Alaska: Trace Elements Investigations 45-1, 11 p. 1 fig.,
- White, Mary G., 1950, Radioactivity and mineralogy of placer concentrates from the Fortymile district, Alaska: Trace Elements Investigations 57-A, 8 p., [2] folded leaves of plates : maps ; 29 cm.,
- White, Mary G., 1950, Examination for radioactivity in a copper-lode prospect on Ruby Creek, Kobuk River valley, Alaska: Trace Elements Investigations 76-A, 8 p., 2 fig. : maps ; 29 cm.,
- White, Walter Stanley, 1950, Radiometric scanning of collections of Keweenawan rocks of the Michigan copper district: Trace Elements Memorandum 34, 7 p. ; 29 cm.,
- Wier, Charles Eugene, 1950, Geology and coal deposits of the Jasonville quadrangle, Clay, Greene and Sullivan Counties, Indiana: Coal Map 1, 2 maps :col. ;58 x 45 cm. on sheet 85 x 120 cm.,
- Willard, Max E.; Linehan, Rev. Daniel, 1950, Geologic interpretations of seismic data, Cheshire, Massachusetts, relocation of route 116, stations 7-135: Open-File Report 50-52, 44 p.,
- Williams, Howel, 1950, Volcanoes of the Paricutin region, Mexico: Bulletin 965-B, 114 p.,
- Wilson, H. D., Jr., 1950, Water levels in observation wells in Santa Barbara County, California, in 1949: Open-File Report 50-110, 53 p., 1 plate,
- Woodring, W. P.; Bramlette, M. N., 1950, Geology and paleontology of the Santa Maria district, California: Professional Paper 222, 185 p.,
- Worts, G. F., Jr. and others, 1950, Progress report on the ground-water investigation in Solano County, California: Open-File Report 50-111, 50 p., 7 plates,
- Wyant, Donald Gray; Beroni, Ernest P., 1950, Reconnaissance for trace elements in North Dakota and eastern Montana. Part 1. Geology and radioactivity. Part 2. Reserves and summary: Trace Elements Investigations 61, 29 p.,
- Young, Kenneth B., 1950, A comparative study of mean-section and mid-section methods for computation of discharge measurements: U.S. Dept. of the Interior, Geological Survey, Water Resources Division, Open-File Report 53-277, 52 p,
