- Averitt, Paul, 1968, Stripping-coal resources of the United States: U.S. Govt. Print. Off., Bulletin 1252-C, 20 p,
- Barosh, Patrick James, 1968, Correlation of Permian and Pennsylvanian sections between the Egan Range and Spring Mountains, Nevada: U.S. Govt. Print. Off., Bulletin 1254-I, p. I1-I8, illus., map. ;24 cm.,
- Cannon, Helen L.; Shacklette, Hansford T.; Bastron, Harry, 1968, Metal absorption by Equisetum (horsetail): U.S.Govt.Print.Off., Bulletin 1278-A, p. A1-A21, ill. ;24cm.,
- Case, James E., 1968, Upper Cretaceous and lower Tertiary rocks, Berkeley and San Leandro Hills, California: U.S. Govt. Print. Off., Bulletin 1251-J, 29 p,
- Cobb, Edward Huntington; Wanek, A. A.; Grantz, Arthur; Carter, Claire, 1968, Summary report on the geology and mineral resources of the Bering Sea, Bogoslof, Simeonof, Semidi, Tixedni, St. Lazaria, Hazy Islands, and Forrester Island National Wildlife Refuges, Alaska: U.S. Govt. Print. Off., Bulletin 1260-K, p. K1-K28 :maps. ;24 cm.,
- Dane, C. H.; Kauffman, Erle G.; Cobban, William Aubrey, 1968, Semilla Sandstone, a new member of the Mancos Shale in the southeastern part of the San Juan Basin, New Mexico: U.S. Govt. Print. Off., Bulletin 1254-F, p. F1-F21, illus., map. ;24 cm.,
- Drewes, Harold, 1968, New and revised stratigraphic names in the Santa Rita Mountains of southeastern Arizona: U.S. Govt. Print. Off., Bulletin 1274-C, p. C1-C15 :map. ;24 cm.,
- Durham, David L., 1968, Geology of the Tierra Redonda Mountain and Bradley quadrangles, Monterey and San Luis Obispo Counties, California: U.S. Govt. Print. Off., Bulletin 1255, 60 p. illus., maps (part col.) ;24 cm.,
- Dutton, Carl E., 1968, Summary report on the geology and mineral resources of the Huron, Seney, Michigan Islands, Green Bay, and Gravel Island National Wildlife Refuges of Michigan and Wisconsin: U.S. Govt. Print. Off., Bulletin 1260-I, p. I1-I14, :maps. ;24 cm.,
- Eargle, D. Hoye, 1968, Nomenclature of formations of Claiborne Group, middle Eocene, Coastal Plain of Texas: U.S. Govt. Print. Off., Bulletin 1251-D, 25 p,
- Finch, Warren Irvin, 1968, Engineering geology of the Paducah West and Metropolis quadrangles in Kentucky: U. S. Govt. Print. Off., Bulletin 1258-B, p. B1-B19, ill., (col. map) ;24 cm.,
- Fischer, Richard Philip; Luedke, R. G.; Sheridan, M. J.; Raabe, R. G., 1968, Mineral resources of the Uncompahgre primitive area, Colorado: U.S. Govt. Print. Off., Bulletin 1261-C, p. C1-C91, illus., maps (3 fold. in pocket) ;24 cm.,
- Fox, Kenneth F., Jr.; Rinehart, C. Dean., 1968, Geology of magnesite deposits in northern Okanogan County, Washington - a preliminary report: U.S. Govt. Print. Off., Bulletin 1272-B, p. B1-B15, illus., fold. map in pocket. ;24 cm.,
- Frye, John Chapman; Willman, H. B.; Rubin, Meyer; Black, R. F., 1968, Definition of Wisconsinan Stage: U.S. Govt. Print. Off., Bulletin 1274-E, p. E1-E22, illus., map. ;24 cm.,
- Gable, Dolores J., 1968, Geology of the crystalline rocks in the western part of the Morrison quadrangle, Jefferson County, Colorado: U.S. Govt. Print. Off., Bulletin 1251-E, 45 p,
- Geological Survey (U.S.), 1968, Bibliography of North American geology, 1963: U.S. G.P.O., Bulletin 1233, 1105 p.,
- Greene, Robert C., 1968, Petrography and petrology of volcanic rocks in the Mount Jefferson area, High Cascade Range, Oregon: U.S. Govt. Print. Off., Bulletin 1251-G, 48 p,
- Hail, William James, Jr., 1968, Geology of southwestern North Park and vicinity, Colorado: U.S. Govt. Print. Off., Bulletin 1257, 119 p. illus., maps (3 fold. col.) ;24 cm.,
- Hawley, C. C.; Robeck, R. C.; Dyer, H. B., 1968, Geology, altered rocks, and ore deposits of the San Rafael Swell, Emery County, Utah: U.S. Govt. Print. Off., Bulletin 1239, 115 p,
- Heath, Jo Ann; Tabacchi, Nancy B., 1968, Bibliography of reports resulting from U.S. Geological Survey participation in the United States Technical Assistance Program, 1940-67: [U.S. Dept. of the Interior, Geological Survey; for sale by the Supt. of Docs.] U.S. Govt. Print. Off., Bulletin 1263, 68 p. ;24 cm.,
- Hobbs, S. W.; Hays, William Henry; Ross, Reuben James, Jr., 1968, The Kinnikinic Quartzite of central Idaho - redefinition and subdivision: U.S. Govt. Print. Off., Bulletin 1254-J, p. J1-J22, illus., maps. ;24 cm.,
- Holmes, G. W.; Hopkins, D. M.; Foster, H. L., 1968, Pingos in central Alaska: Bulletin 1241-H, p. H1-H40,
- Holmes, George William; Foster, Helen Laura, 1968, Geology of the Johnson River area, Alaska: [For sale by the Supt. of Docs.] U.S. Govt. Print. Off., Bulletin 1249, 49 p,
- Johnson, Edward L., 1968, Summary report on the geology and mineral resources of the Charons Gardens Unit, Wichita Mountains National Wildlife Refuge, Comanche County, Oklahoma: U.S. Govt. Print. Off., Bulletin 1260-J, p. J1-J7 :maps ;24 cm.,
- Jolly, Janice L.; Heyl, Allen Van, 1968, Mercury and other trace elements in sphalerite and wallrocks from central Kentucky, Tennessee, and Appalachian zinc districts: U.S. Govt. Print. Off., Bulletin 1252-F, 29 p,
- Jones, C. L.; Madsen, Beth M., 1968, Evaporite geology of Fifth ore zone, Carlsbad district, southeastern New Mexico: U.S. Govt. Print. Off., Bulletin 1252-B, 21 p,
- McKee, Edwin H., 1968, Geology of the Magruder Mountain area, Nevada-California: U.S. Govt. Print. Off., Bulletin 1251-H, 40 p,
- Meisler, Harold; Becher, Albert E., 1968, Carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle, Pennsylvania: U.S. Govt. Print. Off., Bulletin 1254-G, p. G1-G14, illus., maps. ;24 cm.,
- Monroe, Watson Hiner, 1968, The Aguada Limestone of northwestern Puerto Rico: U.S. Govt. Print. Off., Bulletin 1274-G, p. G1-G12, illus., maps. ;24 cm.,
- Mudge, Melville Rhodes; Erickson, Ralph Leroy; Kleinkopf, Dean; Curtin, G. C.; Marranzino, A. P.; Zartman, Robert Eugene, 1968, Reconnaissance geology, geophysics, and geochemistry of the southeastern part of the Lewis and Clark Range, Montana: U.S. Govt. Print. Off., Bulletin 1252-E, 35 p,
- Nelson, Arthur E., 1968, Geology of the Ohio quadrangle, southwestern part of Adirondack Mountains, New York: U.S. Govt. Print. Off., Bulletin 1251-F, 46 p,
- Nelson, Willis H.; Pierce, William Gamewell., 1968, Wapiti formation and Trout Peak Trachyandesite, northwestern Wyoming: U.S. Govt. Print. Off., Bulletin 1254-H, p. H1-H11, illus., map. ;24 cm.,
- Nelson, Willis H.; Ross, Clyde Polhemus, 1968, Geology of part of the Alder Creek mining district, Custer County, Idaho: U.S. Govt. Print. Off., Bulletin 1252-A, 30 p,
- Nichols, Thomas C., Jr., 1968, Engineering geology of the Paducah East quadrangle in Kentucky: U.S. Govt. Print. Off., Bulletin 1258-A, p. A1-A13 :fold. col. map in pocket. ;24 cm.,
- Nichols, Thomas C., Jr.; Abel, John F., Jr.; Lee, Fitzhugh T., 1968, A solid-inclusion borehole probe to determine three-dimensional stress changes at a point in a rock mass: U.S. Govt. Print. Off., Bulletin 1258-C, p. C1-C28, illus. ;24 cm.,
- Olson, Jerry Chipman; Hedlund, David Carl; Hansen, Wallace R., 1968, Tertiary volcanic stratigraphy in the Powderhorn-Black Canyon region, Gunnison and Montrose Counties, Colorado: U. S. Govt. Print. Off., Bulletin 1251-C, 29 p,
- Pavlides, Louis, 1968, Stratigraphic and facies relationships of the Carys Mills Formation of Ordovician and Silurian age, northeast Maine: U.S. Govt. Print. Off., Bulletin 1264, 44 p. illus., maps (1 fold. col. in pocket) ;24 cm.,
- Pease, Maurice Henry, Jr., 1968, Cretaceous and lower Tertiary stratigraphy of the Naranjito and Aguas Buenas quadrangles and adjacent areas, Puerto Rico: U.S. Govt. Print. Off., Bulletin 1253, 57 p,
- Pease, Maurice Henry, Jr., 1968, Summary report on the geology and mineral resources of the Edmunds Unit, Moosehorn National Wildlife Refuge, Washington County, Maine: U.S. Govt. Print. Off., Bulletin 1260-P, p. P1-P18 :maps. ;24 cm.,
- Perdue, Charles L., Jr., 1968, Summary report on the geology and mineral resources of the Passage Key, Island Bay, Cedar Keys, and Pelican Island National Wildlife Refuges, Florida: U.S. Govt. Print. Off., Bulletin 1260-O, p. O1-O13 :maps ;24 cm.,
- Reed, Bruce L., 1968, Geology of the Lake Peters area, northeastern Brooks Range, Alaska: U.S. Govt. Print. Off., Bulletin 1236, 132 p,
- Reichen, Laura E.; Fahey, Joseph J., 1968, Determination of nitrates in saline minerals: U.S. Govt. Print. Off., Bulletin 1214-F, p. F1-F4 ;24 cm.,
- Robie, Richard A.; Waldbaum, David R., 1968, Thermodynamic properties of minerals and related substances at 298.15 K (25.0 C) and one atmosphere (1.013 bars) pressure and at higher temperatures: U.S. Govt. Print. Off., Bulletin 1259, 256 p. ;24 cm.,
- Sainsbury, C. L.; Hamilton, John C.; Huffman, Claude, Jr., 1968, Geochemical cycle of selected trace elements in the tin-tungsten-beryllium district, western Seward Peninsula, Alaska; a reconnaissance study: U. S. Govt. Print. Off., Bulletin 1242-F, 42 p,
- Smedley, Jack Elwood, 1968, Summary report on the geology and mineral resources of the Okefenokee National Wildlife Refuge, Georgia: U.S. Govt. Print. Off., Bulletin 1260-N, p. N1-N10 :maps. ;24 cm.,
- Smith, J. Fred, Jr.; Ketner, Keith Brindley, 1968, Devonian and Mississippian rocks and the date of the Roberts Mountains thrust in the Carlin-Pinon Range area, Nevada: U.S. Govt. Print. Off., Bulletin 1251-I, 18 p,
- Smith, Patsy Beckstead; Durham, David L., 1968, Middle Miocene Foraminifera and stratigraphic relations in the Adelaida quadrangle, San Luis Obispo County, California: U.S. Govt. Print. Off., Bulletin 1271-A, p. A1-A14, illus., maps. ;24 cm.,
- Wahrhaftig, Clyde, 1968, Schists of the central Alaska Range: U.S. Govt. Print. Off., Bulletin 1254-E, p. E1-E22, illus., maps. ;24 cm.,
- Walker, George Walton; Swanson, Donald A., 1968, Summary report on the geology and mineral resources of the Harney Lake and Malheur Lake areas of the Malheur National Wildlife Refuge, north-central Harney County, Oregon: U. S. Govt. Print. Off., Bulletin 1260-L, p. L1-L17 :maps ;24 cm.,
- Walker, George Walton; Swanson, Donald A., 1968, Summary report on the geology and mineral resources of the Poker Jim Ridge and Fort Warner areas of the Hart Mountain National Antelope Refuge, Lake County, Oregon: U.S. Govt. Print. Off., Bulletin 1260-M, p. M1-M16. :maps ;24 cm.,
- Warren, Moultrie Alfred; De Laguna, Wallace; Lusczynski, Norbert Joseph, 1968, Hydrology of Brookhaven National Laboratory and vicinity, Suffolk County, New York: U. S. Govt. Print. Off., Bulletin 1156-C, p. C1-C127, ill., maps. ;24 cm.,
- Weissenborn, Albert Edward; Snavely, Parke Detweiler, Jr., 1968, Summary report on the geology and mineral resources of Flattery Rocks, Quillayute Needles, and Copalis National Wildlife Refuges, Washington: U.S. Govt. Print. Off., Bulletin 1260-F, p. F1-F16, ill., map (fold) ;24 cm.,
- Weissenborn, Albert Edward; Snavely, Parke Detweiler, Jr., 1968, Summary report on the geology and mineral resources of the Oregon Islands National Wildlife Refuge, Oregon: U.S. Govt. Print. Off., Bulletin 1260-G, p. G1-G4 :maps ;24 cm.,
- Weissenborn, Albert Edward; Snavely, Parke Detweiler, Jr., 1968, Summary report on the geology and mineral resources of the Three Arch Rocks National Wildlife Refuge, Oregon: U.S. Govt. Print. Off., Bulletin 1260-H, p. H1-H6 :maps ;24 cm.,
