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- Language: German
- Year: 1988
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- Language: German
- Year: 2007
- Author: Gießen Karl-Heinz
- Language: German
- Year: 1976
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- Language: German
- Year: 2014
- Author: Gascard Johannes R.
- Language: German
- Year: 1993
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- Year: 2008
- Author: Edling Nicolas
- Language: German
- Year: 2015
- Author: Edinger Florian
- Language: German
- Year: 1992
