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1by Kay, Robert T.“...U.S. Geological Survey,...”
Published 2006
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2
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3by Kay, Robert T.“...U.S. Geological Survey,...”
Published 1997
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6by Kay, Robert T.“...U.S. Geological Survey,...”
Published 1997
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7by Kay, Robert T.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2001
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8Published 2004“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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Government Document Book -
9by Kay, Robert T.“...U.S. Deptartment of the Interior, U.S. Geological Survey,...”
Published 2000
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Government Document eBook -
10“...U.S. Department of the Interior, U.S. Geological Survey,...”
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Government Document eBook