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Stuttgart: Enke, 1913
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Reston, Va.: U.S. Department of the Interior, U.S. Geological Survey, 2013
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Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2010
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Reston, Va.; Denver, Colo: U.S. Dept. of the Interior, U.S. Geological Survey, 2004
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Menlo Park, CA; Denver, Colo: U.S. Geological Survey, 2003