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1by Kepferle, Roy Clark, 1926-“...United States Department of the Interior, Geological Survey,...”
Published 1971
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2by Sable, Edward G. (Edward George), 1924-, Kepferle, Roy Clark, 1926-, Peterson, Warren Lee, 1925-“...United States Department of the Interior, Geological Survey,...”
Published 1966
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3by Kepferle, Roy Clark, 1926-“...United States Department of the Interior, Geological Survey,...”
Published 1977
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Government Document eBook