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1by Bybell, Laurel M.“...U.S. Geological Survey bulletin ;...”
Published 1985
Government Document Book -
2by Pomeroy, John S., 1929-“...U.S. Geological Survey bulletin ;...”
Published 1985
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3by Dowsett, Harry J.“...U.S. Geological Survey bulletin ;...”
Published 1989
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4
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5
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6Published 1988“...U.S. Geological Survey bulletin ;...”
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7“...U.S. Geological survey. Bulletin ;...”
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8by Markewich, Helaine W.“...U.S. Geological Survey bulletin ;...”
Published 1988
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