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Hamburg: Ellermann, 1947
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Stuttgart: Metzler, 1962
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Stuttgart: Metzler, 1956
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Stuttgart: Metzler, 1954
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Karlsruhe: Stahlberg, 1948
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Karlsruhe: Stahlberg, 1948
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Jena, 1923 ; Online-Ausgabe, Jena: Thüringer Universitäts- und Landesbibliothek, 2022
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Springer Science and Business Media LLC, 1961
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Springer Science and Business Media LLC, 1960
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Springer Science and Business Media LLC, 1953
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Springer Science and Business Media LLC, 1952
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Springer Science and Business Media LLC, 1950
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JSTOR, 1962
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JSTOR, 1963