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- Language: German
- Year: 2013
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- Language: German
- Year: 2008
- Author: Karl-Friedrich Moersch
- Language: German
- Year: 2012
- Author: Hans-Jürgen Kratz
- Language: German
- Year: 2010
- Author: Peter Ebeling
- Language: German
- Year: 2013
- Author: Peter Ebeling
- Language: German
- Year: 2013