21
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Published: Düsseldorf : Fachhochsch. Düsseldorf, 1988
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Published: Bornheim-Merten : Lamuv-Verl, 1980
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Published: Leipzig : Reclam, 1994
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Published: Berlin : Elefanten-Press, 1996
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Published: Opladen : Leske + Budrich, 1980
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Published: Berlin ; Frankfurt a.M. : Verlag Franz Vahlen, 1957
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