21
22
23
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Book
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Book
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29
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Published: Köln : Kiepenheuer und Witsch, 1965
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Published: Karlsruhe : Argument Verlag, 1964
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33
Published: Karlsruhe : Argument Verlag, 1970
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35
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Published: Göttingen : Vandenhoeck & Ruprecht Verlag, 2005
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38
Published: Basingstoke u.a. : Palgrave Macmillan, 2008
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