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1by Melvin, Robert L.“...U.S. Geological Survey,...”
Published 1995
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2by Melvin, Robert L.“...U.S. Geological Survey,...”
Published 1995
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3by Mullaney, John R.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1999
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4Published 1995“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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5Published 1995“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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6Published 2008“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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7“...U.S. Department of the Interior, U.S. Geological Survey,...”
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Government Document eBook