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1by Crain, Angela S.“...U.S. Geological Survey,...”
Published 2009
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2by Mull, D. S. (Donald S.), 1933-“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1990
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3by Martin, Gary R.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1993
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4by Griffin, Michael S.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1994
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5Published 1997“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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6by Ruhl, Kevin J.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1991
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7by Martin, Gary R.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2001
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8by Martin, Gary R.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2002
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9by Hodgkins, Glenn“...U.S. Dept. of Interior, U.S. Geological Survey,...”
Published 2003
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10by Martin, Gary R.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2001
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