Online Books by
Spencee L. Willett
Books from the extended shelves:
Willett, Spencee L.: Mineral investigation of the Whipple Mountains Wilderness study area, San Bernardino County, California : summary report (U.S. Dept. of the Interior, Bureau of Mines, 1982), also by James Ridenour, Phillip R. Moyle, Geological Survey (U.S.), and United States Bureau of Mines (page images at HathiTrust)
Willett, Spencee L.: Mineral resources of the Diablo Mountain Wilderness study area, Lake County, Oregon (Washington, D.C. : United States Government Printing Office, 1990., 1990), also by M. F. Diggles, Harley D. King, Thomas J. Peters, Gerilyn A. Soreghan, Don L. Sawatzky, James E. Conrad, M. E. Gettings, and Geological Survey (U.S.) (page images at HathiTrust)
Willett, Spencee L.: Mineral resources of the Soda Mountain Wilderness Study Area, Jackson County, Oregon (U.S. G.P.O. ;, 1990), also by William J. Pickthorn, Thomas J. Peters, Mark D. Wilcox, Steven J. Sutley, Donald Plouff, R. J. Goldfarb, and Geological Survey (U.S.) (page images at HathiTrust)
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