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1by Brown, Juliane B.“...U.S. Geological Survey,...”
Published 2008
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2
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3by Weiss, Emanuel“...U.S. Geological Survey,...”
Published 1991
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4
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5by Gregory, Herbert E. (Herbert Ernest), 1869-1952“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 1916
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6by Culver, Melanie“...U.S. Department of the Interior, U.S. Geological Survey,...”
Published 2013
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