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1Published 1909“...Washington, D.C. : Geological Survey (U.S.) (Washington, D.C.)...”
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2by Sawyer, Ernest Walker“...Washington, D.C. : Geological Survey (U.S.);...”
Published 1930
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3by Geological Survey (U.S.)“...[Washington, D.C.] : U.S.Geological Survey...”
Published 1898
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4by Geological Survey (U.S.)“...Washington, D.C. : U.S. Geological Survey...”
Published 1919
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Map