- Blackwelder, Blake W., 1981, Stratigraphy of upper Pliocene and lower Pleistocene marine and estuarine deposits of northeastern North Carolina and southeastern Virginia: U.S. G.P.O. : for sale by Supt. of Docs., U.S. G.P.O., Bulletin 1502-B, iii, p. B1-B16, 1 leaf of plates :ill. ;23 cm.,
- Bromfield, Calvin Stanton; Patten, Lowell L.; Mabey, Don R., 1981, Mineral resources of the Lone Peak wilderness study area, Utah and Salt Lake counties, Utah, with a section on interpretation of aeromagnetic data: U.S. G.P.O., Bulletin 1491, viii, 117 p. ill. ;23 cm.,
- Brown, Robert David, Jr.; Grimes, D. J.; Leinz, Reinhard; Federspiel, F. E.; Leszcykowsky, A. M.; Griscom, Andrew; Brown, R. D., Jr., 1981, Mineral resources of the Snow Mountain Wilderness Study Area, California, with a section on interpretation of aeromagnetic data: U.S. G.P.O., Bulletin 1495, vi, 48 p. ill., maps ;23 cm.,
- Cannon, William F.; Cameron, C. C.; Grosz, A. E.; Dunn, M. L., Jr.; Gazdik, G. C.; Hill, J. J., 1981, Mineral resources of the Rainbow Lake Wilderness Area and Flynn Lake Wilderness Study Area, Bayfield County, Wisconsin: U.S. G.P.O. : for sale by Supt. of Docs. U.S. G.P.O., Bulletin 1511, v, 19 p. :maps ;23 cm.,
- Cannon, William F.; Cameron, C. C.; Klasner, J. S.; Grosz, A. E.; Williams, B. B., 1981, Mineral-resource evaluation of the Round Lake Wilderness Study Area, Price and Vilas counties, Wisconsin: U.S. G.P.O., Bulletin 1512, vi, 23 p. ill., maps ;23 cm.,
- Cornwall, Henry Rowland, 1981, Chromite deposits in the Seiad Valley and Scott Bar quadrangles, Siskiyou County, California: GPO, Bulletin 1382-D, 17 p,
- Creasey, S. C.; Jinks, J. E.; Williams, F. E.; Meeves, H. C.; Davis, W. E., 1981, Mineral resources of the Galiuro Wilderness and contiguous further planning areas, Arizona: U.S. Dept. of the Interior, U.S. Geological Survey : Washington, D.C. : For sale by the Supt. of Docs., U.S. G.P.O., Bulletin 1490, vii, 94 p. :ill., maps ;24 cm.,
- Earhart, Robert L.; Kleinkopf, M. D.; Wilson, D. M.; Grimes, D. J.; Zilka, N. T., 1981, Mineral resources of the Scotchman Peak Wilderness Study Area, Lincoln and Sanders counties, Montana, and Bonner County, Idaho: G.P.O., Bulletin 1467-A-D, 78 p. in various pagings :ill., maps ; 23 cm.,
- Foose, M. P., 1981, Geology, geochemistry, and regional resource implications of a stratabound sphalerite occurrence in the northwest Adirondacks, New York: U.S. G.P.O., Bulletin 1519, iii, 18 p. ill. ;23 cm.,
- Gautier, Donald L., 1981, Petrology of the Eagle Sandstone, Bearpaw Mountains area, north-central Montana: U.S. Dept. of the Interior, Geological Survey : For sale by the Supt. of Docs., U.S. G.P.O., Bulletin 1521, iv, 54 p. ill., 1 map ;24 cm.,
- Geological Survey (U.S.); Bureau of Mines (U.S.), 1981, Mineral resources of the Boulder-Pioneer wilderness study area, Blaine and Custer Counties, Idaho: U.S. G.P.O., Bulletin 1497, 303 p.; 1 portfolio :ill. ;24 cm.,
- Kepferle, Roy Clark; Potter, Paul Edwin; Pryor, Wayne Arthur; Stenbeck, T. V., 1981, Stratigraphy of the Chattanooga Shale (Upper Devonian and Lower Mississippian) in vicinity of Big Stone Gap, Wise County, Virginia, with a section on petrology: U.S. G.P.O. : for sale by the Supt. of Docs., GPO, Bulletin 1499, iv, 20 p. ill., map ;24 cm.,
- Lesure, Frank Gardner; Williams, Bradford B.; Dunn, Maynard L., Jr.; Perry, W. J., Jr., 1981, Mineral resources of the Mill Creek, Mountain Lake, and Peters Mountain Wilderness Study Areas, Craig and Giles Counties, Virginia, and Monroe County, West Virginia: U.S. G.P.O., Bulletin 1510, ix, 76 p. :ill. ;23 cm.,
- Lohman, Stanley William, 1981, The Geologic Story of Colorado National Monument: U.S. Geological Survey Bulletin 1508, xii, 142 p.,
- Luttrell, Gwendolyn Lewise Werth; Hubert, M. L.; Wright, W. B.; Jussen, V. M.; Swanson, R. W., 1981, Lexicon of geologic names of the United States for 1968-1975: U.S. G.P.O., Bulletin 1520, v, 342 p. ;24 cm.,
- Marchand, Denis E.; Allwardt, Alan., 1981, Late Cenozoic stratigraphic units, northeastern San Joaquin Valley, California: U.S. Govt. Print. Off. : for sale by the Supt. of Docs, GPO, Bulletin 1470, iv, 70 p. ill. ;24 cm.,
- Meissner, Charles R., Jr.; Windolph, J. F., Jr.; Mory, P. C.; Harrison, D. K.; Cameron, C. C.; Grosz, A. E.; Perry, W. J., Jr.; Lesure, F. G., 1981, Mineral resources of the Cranberry Wilderness study area, Webster and Pocahontas counties, West Virginia, with sections on peat resources, oil and gas potential, and geochemical survey: U.S. G.P.O. : For sale by Supt. of Docs., Bulletin 1494, vii, 61 p. ill. (3 fold in pocket) ;24 cm.,
- Rymer, Michael J., 1981, Stratigraphic revision of the Cache Formation (Pliocene and Pleistocene), Lake County, California: U.S. G.P.O. : for sale by the Supt. of Docs., G.P.O., Bulletin 1502-C, iv, 35 p. ;24 cm.,
- Sando, William Jasper; Mamet, Bernard L., 1981, Distribution and stratigraphic significance of foraminifera and algae in well cores from Madison Group (Mississippian), Williston Basin, Montana: Bulletin 1529-F, iii, p. F1-F12, ill., maps ; 23 cm.,
- Slack, John F.; Gazdik, Gertrude C.; Dunn, Maynard L., Jr., 1981, Mineral resources of the Big Frog wilderness study area and additions, Polk County, Tennessee and Fannin County, Georgia: U.S. G.P.O., Bulletin 1531, 25 p. ;23 cm.,
- Snyder, John Parr, 1981, Space Oblique Mercator projection mathematical development: U.S. Geological Survey ; For sale by Supt. of Docs., U.S. G.P.O., Bulletin 1518, vi, 108 p. ill. ;23 cm.,
- Swanson, Roger Warren; Hubert, M. L.; Luttrell, G. W.; Jussen, V. M., 1981, Geologic names of the United States through 1975: U.S. G.P.O., Bulletin 1535, iii, 643 p. ;24 cm.,
- Thayer, Thomas Prence; Case, James E.; Stotelmeyer, Ronald B., 1981, Mineral resources of the Strawberry Mountain Wilderness and adjacent areas, Grant County, Oregon: U.S. Dept. of the Interior, geological Survey : For sale by the Supt. of Docs., U.S. G.P.O., Bulletin 1498, xi, 67 p., 1 folded leaf of plates :ill., maps ;24 cm.,
- Thorman, Charles H.; Drewes, Harald; Lane Michael E., 1981, Mineral resources of the Rincon wilderness study area, Pima County, Arizona: U.S. Dept. of the Interior : For sale by the Supt. of Docs., U.S. G.P.O., Bulletin 1500, 62 p., 2 folded leaves of plates :ill., maps ;23 cm.,
- U. S. Geological Survey; U. S. Bureau of Mines., 1981, Mineral resources of the Cabinet Mountains Wilderness, Lincoln and Sanders counties, Montana: U.S. Dept. of the Interior, Geological Survey ; For sale by the Supt. of Docs., U.S. G.P.O., Bulletin 1501, v, 77 p. ill. (some col.), maps ;24 cm.,
