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Berlin; Heidelberg [u.a.]: Springer, 1958
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Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2013
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Reston, Virginia: U.S. Department of the Interior, U.S. Geological Survey, 2019
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Reston, Va: U.S. Department of the Interior, U.S. Geological Survey, 2015
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Ottawa: Geological Survey of Canada, 1998
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Reston, Va: U.S. Department. of the Interior, U.S. Geological Survey, 2013