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1Published 1987“...The Survey,...”
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2Published 1987“...The Survey ;...”
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3Published 1987“...The Survey ;...”
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4Published 1995“...The Survey ;...”
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5Published 1995“...The Survey ;...”
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7
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8Published 2000“...The Survey,...”
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9Published 2000“...The Survey ;...”
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10Published 1982“...The Survey ;...”
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11
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12
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13Published 1991“...U.S. Geological Survey ;...”
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14by Peltz, Lorri A. (Lorri Ann), 1959-“...U.S. Geological Survey ;...”
Published 1991
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15by Drzymkowski, Robert E.“...U.S. Geological Survey ;...”
Published 1992
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16
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17by Elliott, John G. (John Grant), 1951-“...U.S. Geological Survey,...”
Published 2004
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18by Juracek, Kyle E.“...U.S. Geological Survey,...”
Published 2006
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19by Beck, David A.“...U.S. Geological Survey,...”
Published 2006
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20by Bartholow, John M.“...U.S. Geological Survey,...”
Published 2006
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