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1
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2
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3Published: Köln | Bund-Verl. | 1991Book
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4
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5Published: Wiesbaden | VS Verl. für Sozialwissenschaften | 2004Book
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6Published: Köln | Bund-Verl. | 1999Book
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7Published: Bonn | Dietz | 2011Book
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8Published: Frankfurt ; New York | Campus Verlag | [2017]Book