- 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.,
- 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.,
- 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.,
- 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.,
- 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.,
- 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**,
- 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.,
- 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.,
- Macdonald, G. A.; Orr, J. B., 1950, The 1949 summit eruption of Mauna Loa, Hawaii: Bulletin 974-A, 33 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.,
- 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.,
- 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.,
- 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.,
- 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.,
- Segerstrom, Kenneth, 1950, Erosion studies at Paricutin, State of Michoacan, Mexico: Bulletin 965-A, 164 p.,
- 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,
- 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.,
- 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.,
- Williams, Howel, 1950, Volcanoes of the Paricutin region, Mexico: Bulletin 965-B, 114 p.,
