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1by Rupert, Michael G., 1965-“...U.S. Geological Survey,...”
Published 1994
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2by Low, Walton H.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 1997
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3by Rupert, Michael G., 1965-“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2014
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4by Williamson, Alex K.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1998
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5“...U.S. Deptartment of the Interior, U.S. Geological Survey,...”
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