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1Published 1990“...U.S. Geological Survey ;...”
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2by Chastain, Robert A.“...U.S. Geological Survey,...”
Published 2006
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4Published 2008“...U.S. Geological Survey,...”
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5by Mugel, Douglas N.“...U.S. Geological Survey,...”
Published 2009
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6Published 1997“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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7by Imes, Jeffrey L.“...U.S. Geological Survey, U.S. Dept. of the Interior,...”
Published 2002
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8Published 2014“...U.S. Department of the Interior, U.S. Geological Survey,...”
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9by Weary, David J.“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2016
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10“...U.S. Department of the Interior, U.S. Geological Survey,...”
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