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1by Truini, Margot“...U.S. Geological Survey,...”
Published 2006
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2by Truini, Margot“...U.S. Geological Survey,...”
Published 2007
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3
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9by Littin, G. R.“...U.S. Geological Survey,...”
Published 1992
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10by Owen-Joyce, Sandra J.“...U.S. Geological Survey,...”
Published 1992
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11
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12by Brown, James G. (James Gary), 1956-“...U.S. Geological Survey,...”
Published 1990
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13by Littin, G. R.“...U.S. Geological Survey,...”
Published 1993
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14by Holmes, Walter F.“...U.S. Geological Survey,...”
Published 1997
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15by Hanson, R. T.“...U.S. Geological Survey,...”
Published 1996
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16
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17by Hoffmann, John P.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2002
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18by Thomas, Blakemore E.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2002
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19by Parker, John T. C.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 1998
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20by Littin, G. R.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 1999
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Government Document eBook