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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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3by Johnson, Raymond H.“...U.S. Geological Survey,...”
Published 2009
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4by Butler, David L. (David Louis), 1946-“...U.S. Geological Survey,...”
Published 1996
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5
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6by Risser, Dennis W.“...U.S. Geological Survey,...”
Published 1982
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10by Hoffman, Ray J.“...U.S. Geological Survey,...”
Published 1994
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13by Levings, Gary W.“...U.S. Geological Survey,...”
Published 1986
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14
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16by Sumioka, S. S.“...U.S. Geological Survey,...”
Published 1991
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17
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18by Sando, Steven Kent, 1956-“...U.S. Geological Survey,...”
Published 1991
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19by Frenzel, Peter F.“...U.S. Geological Survey,...”
Published 1992
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