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1by 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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2by Welch, Stewart W.“...[United States Department of the Interior, Geological Survey],...”
Published 1958
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3“...United States Department of the Interior, Geological Survey,...”
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4by Hopkins, Herbert T., 1923-“...United States Department of the Interior, Geological Survey,...”
Published 1970
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5“...United States Department of the Interior, Geological Survey,...”
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