1. Depositional environments of the White Rim Sandstone Member of the Permian Cutler Formation, Canyonlands National Park, Utah / by Brenda A. Steele. Steele, Brenda A. [Reston, Va.] : Department of the Interior, U.S. Geological Survey, 1987.Washington : United States Government Printing Office. Book Online
2. Large and rich phosphorus resources in the Phosphoria Formation in the Soda Springs area, southeastern Idaho / by R.A. Gulbrandsen and Donathon J. Krier. Gulbrandsen, Robert A. [Reston, Va.] : United States Department of the Interior, Geological Survey, 1980.Washington : United States Government Printing Office Book Online
3. The Permian and Triassic Seven Devils Group, western Idaho and northeastern Oregon / by Tracy L. Vallier. Vallier, Tracy L. (Tracy Lowell), 1936- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1977.Washington : United States Government Printing Office. Book Online
4. Revision of the type Mankomen Formation (Pennsylvanian and Permian), Eagle Creek area, eastern Alaska Range, Alaska / by D.H. Richter and J.T. Dutro, Jr. Richter, Donald H. [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1975.Washington : United States Government Printing Office. Book Online
5. The Supai Group -- subdivision and nomenclature / by Edwin D. McKee. McKee, Edwin D. (Edwin Dinwiddie), 1906-1984 [Reston, Va.] : United States Department of the Interior, Geological Survey, 1975.Washington : United States Government Printing Office. Book Online
6. The Upper Paleozoic Madera group in the Manzano Mountains, New Mexico / by Donald A. Myers. Myers, Donald A., 1921- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1972.Washington, D.C. : U.S. Government Printing Office. Book Online
7. Stratigraphy of the State Bridge Formation in the Woody Creek quadrangle, Pitkin and Eagle Counties, Colorado / by Val L. Freeman. Freeman, Val L., 1926- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1971.Washington : U.S. Government Printing Office. Book Online
8. The Skolai Group in the McCarthy B-4, C-4, and C-5 quadrangles, Wrangell Mountains, Alaska : definition and description of a new low-grade metamorphic sequence / by James G. Smith and E.M. MacKevett, Jr. Smith, James G., 1939- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1970.Washington : United States Government Printing Office. Book Online
9. Probable Permian age of the Rampart Group, central Alaska : fossil collections and rock samples from a limestone bed within the volcanic sequence of the Rampart Group show that the group is probably Permian in age / by W.P. Brosgé [and three others]. Brosgé, William Peters, 1920-2006 [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1969.Washington : U.S. Government Printing Office. Book Online
10. Correlation of Permian and Pennsylvanian sections between Egan Range and Spring Mountains, Nevada / by Patrick J. Barosh. Barosh, Patrick J. (Patrick James), 1936- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1968.Washington : U.S. Government Printing Office. Book Online
11. Permian rock units in the Glass Mountains, west Texas : nomenclature, revisions in ages, and local correlations of rock units of the Leonard Series and lower part of the Guadalupe Series / by G. Arthur Cooper and Richard E. Grant. Cooper, G. Arthur (Gustav Arthur), 1902-2000 [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1966.Washington : United States Government Printing Office. Book Online
12. Petrography of evaporites from the Wellington Formation near Hutchinson, Kansas : a study of halite, anhydrite, and carbonate rocks in a part of the lower permian sequence of central Kansas / by C.L. Jones. Jones, C. L. (Charles Leslie), 1922- [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1965.Washington : United States Government Printing Office. Book Online
13. Minor elements in bedrock soil, and vegetation at an outcrop of the Phosphoria Formation on Snowdrift Mountain southeastern Idaho / by Frederick B. Lotspeich and Ellen L. Markward. Lotspeich, Frederick B., 1914-2005 Washington, D.C. : United States Department of the Interior, Geological Survey, 1963.Washington, D.C. : Government Printing Office Book Online
14. Geology of the Grosvenor quadrangle, Brown and Coleman Counties, Texas / by Robert T. Terriere. Terriere, Robert T., 1926- Washington, D.C. : United States Department of the Interior, Geological Survey, 1960.Washington, D.C. : Government Printing Office. Book Online
15. Stratigraphy of the Wichita group in part of the Brazos River Valley, north Texas / by Philip T. Stafford. Stafford, Philip T. Washington, D.C. : United States Department of the Interior, Geological Survey, 1960.Washington, D.C. : Government Printing Office. Book Online
16. Pennsylvanian and Permian rocks of the southern Inyo Mountains, California / by Charles W. Merriam and Wayne E. Hall. Merriam, C. W. (Charles Warren), 1905-1974 [Washington, D.C.] : United States Department of the Interior, Geological Survey.Washington : United States Government Printing Office, 1957. Book Online