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Published: Köln : Bund-Verl, 1984
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5
Published: Duisburg : Diss-Verl, 2000
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7
Published: Marburg : Jonas-Verl, 1989
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10
Published: Köln : PapyRossa-Verl, 2000
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11
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12
Published: Opladen : Westdt. Verl, 1998
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