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1by Konieczki, A. D.“...U.S. Geological Survey ;...”
Published 1997
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2Published 1996“...U.S. Geological Survey ;...”
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3Published 1997“...U.S. Geological Survey ;...”
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5Published 2008“...U.S. Geological Survey,...”
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6by Webb, Robert H.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1997
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7“...U.S. Department of the Interior, U.S. Geological Survey,...”
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8by Schmidt, John C., 1950-“...Dept. of the Interior, U.S. Geological Survey :...”
Published 1988
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9by Schmidt, John C., 1950-“...Dept. of the Interior, U.S. Geological Survey ;...”
Published 1990
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