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1by Nystrom, Elizabeth A.“...U.S. Geological Survey,...”
Published 2006
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2by Nystrom, Elizabeth A.“...U.S. Geological Survey,...”
Published 2007
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3by Eckhardt, David A.“...U.S. Geological Survey,...”
Published 2007
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4by Nystrom, Elizabeth A.“...U.S. Geological Survey,...”
Published 2007
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9by Bergeron, Marcel P.“...U.S. Geological Survey,...”
Published 1987
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10by Soren, Julian“...U.S. Geological Survey,...”
Published 1976
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14by Barnes, Charles R.“...U.S. Geological Survey,...”
Published 1986
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18by Soren, Julian“...U.S. Geological Survey,...”
Published 1988
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19by Soren, Julian“...U.S. Geological Survey,...”
Published 1978
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