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- Language: German
- Year: 2002
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- Language: German
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- Language: German
- Year: 1994
- Author: Reinersdorff Wolfgang von
- Language: German
- Year: 1984
- Author: Rauch Elmar
- Language: English
- Year: 1984
- Author: Pörtner Regina
- Language: German
- Year: 2009
- Author: Mertens Lothar
- Language: German
- Year: 2006