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Potsdam: Universität Potsdam, 2014
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KLUEDO - Publication Server of University of Kaiserslautern-Landau (RPTU), 2008
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Springer Science and Business Media LLC, 1953
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Wiley, 1954
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Springer Science and Business Media LLC, 1954
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Springer Science and Business Media LLC, 1943
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Springer Science and Business Media LLC, 1942
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Wiley, 1910