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Wien; München: Doblinger, c 1969
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Chichester: Wiley, 2019
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Köln: Volk, c 1970
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Leipzig: Hofmeister, c 1955
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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, 2015
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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, 2015
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Reston, Va.: U.S. Department 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, 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, 2014
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Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2012
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Reston, VA: U.S. Geological Survey, 1999
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Reston: U.S. Geological Survey, 2017
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Reston: U.S. Geological Survey, 2022
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Reston: U.S. Geological Survey, 2021
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Reston: U.S. Geological Survey, 2020
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Reston: U.S. Geological Survey, 2019
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Reston: U.S. Geological Survey, 2018