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- Language: English
- Year: 2002
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- Author: Ulrich Strunz
- Language: German
- Year: 2001
- Author: Catharina Wilhelm
- Language: German
- Year: 2001
- Author: Gina Greifenstein
- Language: German
- Year: 2003
- Author: Günther Sator
- Language: German
- Year: 1997
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- Language: German
- Year: 1991
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- Language: German
- Author: Reinhardt Hess Jörn Rynio
- Language: German
- Year: 2002
- Author: Gudrun Ruschitzka
- Language: German
- Year: 1997