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1by Pugh, Aaron L.“...U.S. Geological Survey,...”
Published 1998
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2
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3by Pugh, Aaron L.“...U.S. Geological Survey,...”
Published 1998
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4by Stanton, Gregory P.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1998
Government Document Book -
5by Pugh, Aaron L.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1998
Government Document Book -
6Published 1998“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Government Document Book -
7“...U.S. Department of the Interior, U.S. Geological Survey,...”
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