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1“...United States Department of the Interior, Geological Survey,...”
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2“...United States Department of the Interior, Geological Survey,...”
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3“...United States Department of the Interior, Geological Survey,...”
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4by Sayre, A. N. (Albert Nelson), 1901-“...United States Department of the Interior, Geological Survey,...”
Published 1947
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5by Paulsen, Carl G.“...United States Department of the Interior, Geological Survey,...”
Published 1949
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6by Hackett, O. M.“...United States Department of the Interior, Geological Survey,...”
Published 1963
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7by Sayre, A. N.“...United States Department of the Interior, Geological Survey,...”
Published 1957
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Government Document eBook -
8by Sayre, A. N. (Albert Nelson), 1901-“...United States Department of the Interior, Geological Survey,...”
Published 1957
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Government Document eBook