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1by Morton, Robert B.“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
Published 1992
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2Published 2003“...U.S. Dept. of the Interior, U.S. Geological Survey ;...”
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3Published 2006“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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4Published 2008“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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5Published 2004“...U.S. Dept. of the Interior, U.S. Geological Survey,...”
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6by Parkhurst, Renee S.“...Dept. of the Interior, U.S. Geological Survey ;...”
Published 1989
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7by Dart, R. L. (Richard L.)“...Dept. of the Interior, U.S. Geological Survey ;...”
Published 1990
Government Document Book