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7by Abeyta, Cynthia G.“...U.S. Geological Survey ;...”
Published 1990
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10by Van Gosen, B. S. (Bradley S.), 1960-“...U.S. Geological Survey :...”
Published 1991
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11by Truini, Margot“...U.S. Geological Survey,...”
Published 2006
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12by Truini, Margot“...U.S. Geological Survey,...”
Published 2007
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14Published 1990“...U.S. Geological Survey,...”
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15by Johnson, Raymond H.“...U.S. Geological Survey,...”
Published 2009
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16by Mapel, W. J. (William Jameson), 1922-“...U.S. Geological Survey,...”
Published 1985
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17by Mapel, W. J. (William Jameson), 1922-“...U.S. Geological Survey,...”
Published 1985
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18by Mapel, W. J. (William Jameson), 1922-“...U.S. Geological Survey,...”
Published 1985
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19by Mapel, W. J. (William Jameson), 1922-“...U.S. Geological Survey,...”
Published 1985
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20by Butler, David L. (David Louis), 1946-“...U.S. Geological Survey,...”
Published 1996
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