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New York [u.a.]: Wiley-Interscience, 1970
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Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2015
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Reston, Va.: U.S. Department of the Interior, U.S. Geological Survey, 2015
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Reston, Va: U.S. Geological Survey, 2008
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Reston, Va: U.S. Geological Survey, 2016-
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Reston, Va: U.S. Geological Survey, 2016
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Reston, Va: U.S. Geological Survey, 2016
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Reston, Va.: U. S. Department of the Interior, U.S. Geological Survey, 2012
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Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2006