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2by Bragg, Heather M.“...U.S. Geological Survey,...”
Published 2004
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5by Johnston, Matthew W.“...U.S. Geological Survey,...”
Published 2006
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6by Wells, Ray E.“...U.S. Geological Survey,...”
Published 2006
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7by Plouff, Donald“...U.S. Geological Survey,...”
Published 2006
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8by Hagar, Joan“...U.S. Geological Survey,...”
Published 2007
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11by Schulz, William H.“...U.S. Geological Survey,...”
Published 2007
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12
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14by DeGross, Douglas J.“...U.S. Geological Survey,...”
Published 2007
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15by McCormick, Paul“...U.S. Geological Survey,...”
Published 2007
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18by Dunham, J. (Jason), 1964-“...U.S. Geological Survey,...”
Published 2008
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