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1Published 1984“...U.S. Geological Survey,...”
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2Published 1990“...U.S. Geological Survey ;...”
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3Published 1991“...U.S. Geological Survey ;...”
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4Published 1992“...U.S. Geological Survey ;...”
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5Published 1993“...U.S. Geological Survey ;...”
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6Published 1993“...U.S. Geological Survey :...”
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7Published 1993“...U.S. Geological Survey :...”
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8Published 1994“...U.S. Geological Survey ;...”
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9Published 1994“...U.S. Geological Survey ;...”
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10by Condon, Steven M.“...U.S. Geological Survey ;...”
Published 2005
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11by Sweeney, Ronald E.“...U.S. Geological Survey,...”
Published 2005
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12Published 1988“...U.S. Geological Survey,...”
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13by Scott, Glenn R., 1918-2012“...U.S. Geological Survey,...”
Published 1978
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14by Scott, Glenn R., 1918-2012“...U.S. Geological Survey,...”
Published 1968
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18by Wagner, Holly C. (Holly Clyde), 1918-2005“...U.S. Geological Survey,...”
Published 1954
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19by Hansen, Cristi V.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2009
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20by Hansen, Cristi V.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2009
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