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1Published 1910Subjects: “...Geological Survey (U.S.)...”
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2Published 1916Subjects: “...Geological surveys....”
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3Published 1926Subjects: “...Geological Survey (U.S.)...”
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4Published 1892Subjects: “...Geological Survey (U.S.)...”
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5Published 1890Subjects: “...Geological Survey (U.S.)...”
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