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1“...U.S. Department of the Interior, U.S. Geological Survey,...”
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2“...U.S. Department of the Interior, U.S. Geological Survey,...”
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3by Cowdery, T. K. (Timothy K.)“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1998
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4“...U.S. Department of the Interior, U.S. Geological Survey,...”
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5“...U.S. Department of the Interior, U.S. Geological Survey,...”
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6by Goldstein, Robert M.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1999
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7“...U.S. Department of the Interior, U.S. Geological Survey,...”
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Government Document eBook