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3by Hedlund, David Carl, 1924-“...U.S. Geological Survey,...”
Published 1984
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4by Hedlund, David Carl, 1924-“...U.S. Geological Survey,...”
Published 1985
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5by Moench, Robert Hadley, 1926-“...U.S. Geological Survey,...”
Published 1963
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6by Personius, Stephen F.“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
Published 2001
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7by Thompson, Ren A.“...U.S. Dept. of the interior, U.S. Geological Survey,...”
Published 2009
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