- Author: Stille Frank, Zwiener Rudolf
- Language: German
- Year: 1997
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- Language: German
- Year: 2003
- Author: Preißl Brigitte, Haas Hansjörg
- Language: German
- Year: 1999
- Author: Parsche Rüdiger, Seidel Bernhard, Teichmann Dieter
- Language: German
- Year: 1988