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Reston, Va: U.S. Dept. of the Interior, U.S. Geological Survey, 2013
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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, 2009
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Reston, Va: U.S. Geological Survey, 2008
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Reston: U.S. Geological Survey, 2019
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Reston: U.S. Geological Survey, 2018
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Reston: U.S. Geological Survey, 2017
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Washington, D.C: Energy Information Administration, 2009
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Reston: U.S. Geological Survey, 2019
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Reston: U.S. Geological Survey, 2018
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Reston: U.S. Geological Survey, 2017
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Reston: U.S. Geological Survey, 2017
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2013
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Reston: U.S. Geological Survey, 2017
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2008