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1by Stewart, J. S.“...U.S. Geological Survey,...”
Published 1998
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5by Stewart, J. S.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1998
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6by Rheaume, S. J.“...U.S. Dept. of the Interior, U.S. Geological Survey :...”
Published 1996
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7by Fitzpatrick, Faith A.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1996
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8by Richards, K. D.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1998
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9by Eikenberry, Barbara C. Scudder“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 2001
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