- Author: Willke Helmut
- Language: German
- Year: 1975
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- Language: German
- Year: 2020
- Author: Schirmer Katrin
- Language: German
- Year: 2008
- Author: Pajunk Frederik
- Language: German
- Year: 2002
- Author: Holländer Pavel
- Language: German
- Year: 2013
- Author: Hauser Richard
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- Year: 1999
- Author: Hasse Rolf
- Language: German
- Year: 1977