- Brugman, Melinda M.; Post, Austin, 1981, Effects of volcanism on the glaciers of Mount St. Helens: U.S Geological Survey Circular 850-D, v, 11 p.,
- Cannon, William F.; Mudrey, M. G., 1981, The potential for diamond-bearing kimberlite in northern Michigan and Wisconsin: U.S. Geological Survey, Circular 842, iii, 15 p. :ill., map ;26 cm.,
- Compiled by Bergquist, Wenonah E.; Tinsley, E. J.; Yordy, Laura; Miller, R. L., 1981, Worldwide directory of national earth-science agencies and related international organizations: U.S. Geological Survey, Circular 834, iv, 87 p. :maps ;26 cm.,
- Compiled by Shawe, Daniel R., 1981, U.S. Geological Survey workshop on nonfuel mineral-resource appraisal of wilderness and CUSMAP areas: U.S. Geological Survey, Circular 845, iii, 18 p. :ill. ;26 cm.26 cm.,
- Cressman, Earle Rupert; Noger, Martin C., 1981, Geologic mapping of Kentucky; a history and evaluation of the Kentucky Geological Survey--U.S. Geological Survey Mapping Program, 1960-1978: U.S. Dept. of the Interior, Geological Survey, Circular 801, iii, 22 p. :ill., maps ;26 cm.,
- Cummans, John, 1981, Mudflows resulting from the May 18, 1980, eruption of Mount St. Helens, Washington: U.S. Dept. of the Interior, Geological Survey, Circular 850-B, v, B1-B16 p. :ill., maps ;27 cm.,
- Detterman, Robert L.; Case, J. E.; Cox, D. P.; Detra, D. E.; Miller, T. P.; Wilson, F. H., 1981, The Alaskan Mineral Resource Assessment Program; background information to accompany folio of geologic and resources maps of the Chignik and Sutwik Island quadrangles, Alaska: U.S. Dept. of the Interior, Geological Survey ;
Branch of Distribution, U.S. Geological Survey, Circular 802, iii, 16 p. :ill. ;27 cm.,
- Dion, N. P.; Embrey, S. S., 1981, Effects of Mount St. Helens eruption on selected lakes in Washington: U.S. Dept. of the Interior, Geological Survey ;
Free on application to Distribution Branch, Text Products Section, U.S. Geological Survey, Circular 850-G, v, G1-G25 p. :ill., maps ;26 cm.,
- Dolton, G. L.; Carlson, K. H.; Charpentier, R. R.; Coury, A. B.; Crovelli, R. A.; Frezon, S. E.; Khan, A. S.; Lister, J. H.; McMullin, R. H.; Pike, R. S.; Powers, R. B.; Scott, E. W.; Varnes, K. L., 1981, Estimates of undiscovered recoverable conventional resources of oil and gas in the United States: U.S. Geological Survey, Circular 860, iv, 87 p. : ill., maps ; 28 cm.,
- Earhart, Robert L.; Grimes, David J.; Leinz, Reinhard W.; Kleinkopf, M. Dean., 1981, The Conterminous United States Mineral Appraisal Program; background information to accompany folio of geologic, geochemical, geophysical, and mineral resource maps of the Choteau 1 degree x 2 degrees Quadrangle, Montana: U.S. Geological Survey, Circular 849, iii, 8 p. :map ;26 cm.26 cm.,
- Edited by Albert, Nairn R. D.; Hudson, Travis., 1981, The United States Geological Survey in Alaska; accomplishments during 1979: United States Geological Survey, Circular 823-B, viii, B1-B151 p. :ill., maps ;27 cm.27 cm.,
- Edited by Greeson, Phillip E., 1981, Biota and biological parameters as environmental indicators: U.S. Dept. of the Interior, Geological Survey, Circular 848-B, v, B1-B24 p. ;ill. ;26 cm.,
- Edited by Greeson, Phillip E., 1981, Organic substances in water: U.S. Geological Survey, Circular 848-C, v, C1-C19 p. ;27 cm.,
- Edited by Greeson, Phillip E., 1981, Microbiology of the aquatic environment: U.S. Dept. of the Interior, Geological Survey ;
Distribution Branch, Text Products Section, U.S. Geological Survey, Circular 848-E, v, E1-E33 p. :ill. ;27 cm.,
- Edited by Reed, Katherine M.; Gilmore, Robert F.; Harris, Linda-Lee; Tennison, Lisa D., 1981, The U.S. Geological Survey in Alaska; 1981 programs: U.S. Geol. Survey, Circular 843, 111 p. :ill. ;26 cm.,
- Fuste, Luis A., 1981, Effects of the Mount St. Helens eruption on the benthic fauna of the Toutle River, Muddy River, and Pine Creek drainage basins, Washington: U.S. Dept. of the Interior, Geological Survey, Circular 850-H, v, H1-H13 p. :ill., maps ;26 cm.,
- Greeson, Phillip E., 1981, Infectious waterborne diseases: U.S. Geological Survey, Circular 848-D, v, D1-D16 p. ;27 cm,
- Guild, Philip White, 1981, Preliminary metallogenic map of North America; a numerical listing of deposits: U.S. Dept. of the Interior, Geological Survey, Circular 858-A, iv, A1-A93 p. :ill. ;26 cm.,
- Guild, Philip White, 1981, Preliminary metallogenic map of North America; an alphabetical listing of deposits: U.S. Dept. of the Interior, Geological Survey, Circular 858-B, iii, B1-B72 p. ;26 cm.,
- Jennings, Marshall E.; Schneider, V. R.; Smith, P. E., 1981, Emergency assessment of Mount St. Helens post-eruption flood hazards, Toutle and Cowlitz rivers, Washington: U.S. Geological Survey, 1981 Circular 850-I, v, I1-I7 p. :ill., map ;26 cm.,
- Johnston, David A.; Donnelly-Nolan, Julie M., 1981, Guides to Some Volcanic Terranes in Washington, Idaho, Oregon, and Northern California: U.S. Geological Survey Circular 838, x, 189 p.,
- Lombard, R. E.; Miles, M. B.; Nelson, L. M.; Kresch, D. L.; Carpenter, P. J., 1981, Channel conditions in the lower Toutle and Cowlitz Rivers resulting from the mudflows of May 18, 1980: U.S. Dept. of the Interior, Geological Survey ;
Free on application to Distribution Branch, Text Products Section, U.S. Geological Survey, Circular 850-C, v, C1-C16 p. :ill., maps ;26 cm.,
- McKnight, Diane M.; Feder, Gerald L.; Stiles, Eric A., 1981, Toxicity of Mount St. Helens ash leachate to a blue-green alga: U.S. Dept. of the Interior, Geological Survey, 1981 Circular 850-F, v, F1-F14 p. :ill., maps ;26 cm.,
- Minsch, J. H.; Stover, C. W.; Reagor, B. G.; Smith, P. K., 1981, Earthquakes in the United States, July-September 1980: U.S. Dept. of the Interior, Geological Survey ;
[available from] Branch of Distribution, U.S. Geological Survey, Circular 853-C, iv, C1-C42 p. :ill., maps ;26 cm.,
- Shulters, M. V.; Clifton, Daphne G., 1981, Mount St. Helens volcanic-ash fall in the Bull Run watershed, Oregon, March-June 1980: U.S. Dept. of the Interior, Geological Survey, Circular 850-A, v, A1-A15 p. :ill. ;26 cm.,
- Steele, Timothy Doak; Hillier, Donald E., 1981, Assessment of impacts of proposed coal-resource and related economic development on water resources, Yampa River basin, Colorado and Wyoming; a summary: U.S. Dept. of the Interior, Geological Survey, Circular 839, vi, 56 p. :ill., maps ;26 cm.,
- Stover, Carl W.; Minsch, J. H.; Dunbar, P. K.; Baldwin, G. W., 1981, Earthquakes in the United States, July-September 1981: U.S. Dept. of the Interior, Geological Survey ;
[available from] Branch of Distribution, U.S. Geological Survey, Circular 871-C, iv, C1-C34 p. :maps ;26 cm.,
- Stover, Carl W.; Minsch, J. H.; Reagor, B. G.; Smith, P. K., 1981, Earthquakes in the United States, October-December 1979: U.S. Dept. of the Interior, Geological Survey ;
[available from] Branch of Distribution, U.S. Geological Survey, Circular 836-D, iv, D1-D43 p. :ill., maps ;26 cm.,
- Stover, Carl W.; Minsch, J. H.; Reagor, B. G.; Smith, P. K., 1981, Earthquakes in the United States, January-March 1980: U.S. Dept. of the Interior, Geological Survey ;
[available from] Branch of Distribution, U.S. Geological Survey, Circular 853-A, iv, A1-A41 p. :ill., maps ;26 cm.,
- Stover, Carl W.; Minsch, J. H.; Smith, P. K.; Person, W. J., 1981, Earthquakes in the United States, April-June 1980: U.S. Dept. of the Interior, Geological Survey ;
[available from] Branch of Distribution, U.S. Geological Survey, Circular 853-B, iv, B1-B53 p. :maps ;26 cm.,
- Walker, A. S.; Robinove, Charles Joseph., 1981, Annotated bibliography of remote sensing methods for monitoring desertification: U.S. Geological Survey, Circular 851, iii, 25 p. ;26 cm.,
- Whitmore, Frank C., 1981, Resources for the 21st century; summary and conclusions of the International Centennial Symposium of the U.S. Geological Survey: U.S. Geological Survey, Circular 857, iii, 41 p. :ill. ;26 cm.,
