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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. Dept. of the Interior, U.S. Geological Survey, 2015
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Reston: U.S. Geological Survey, may 29, 2014
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Reston: U.S. Geological Survey, 2014
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Reston: U.S. Geological Survey, july 25, 2014
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2014
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2014
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Reston: U.S. Geological Survey, september 10, 2013
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Reston: U.S. Geological Survey, may 15, 2012
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Reston: U.S. Geological Survey, october 2010
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Reston: U.S. Geological Survey, march 5, 2010
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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. Dept. of the Interior, U.S. Geological Survey, 2013
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Washington/D.C, 2011 ; Online-Ausg.
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Brussels, 03/01/2017
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Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2011
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Washington/D.C, 2012
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[Washington, DC]: U.S. Department of Energy, july 2023