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USGS geochemical studies outline mineral potential and environmental hazards in southeastern Oregon.
[Denver, CO] : U.S. Geological Survey, 1997
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by Farrell, Mary M., Gillespie, William B., Spoerl, Patricia M., Wilson, John P. (John Peter), 1955-
[Albuquerque, N.M.?] : USDA Forest Service, Southwestern Region, 1995
[Albuquerque, N.M.?] : USDA Forest Service, Southwestern Region, 1995
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