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Reston: U.S. Geological Survey, 2018
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2014
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Ottawa: Geological Survey of Canada, 2015
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Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2016
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Ottawa: Geological Survey of Canada, 2015
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Ottawa: Geological Survey of Canada, 2015
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Ottawa: Natural Resources Canada, 2015
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Ottawa: Geological Survey of Canada, 2002