- Author: Barbara Breitenberger
- Language: English
- Year: 2007
- Author: Barbara Breitenberger
- Language: German
- Year: 2014
- Author: Hellmut Flashar, Uwe Dubielzig, Barbara Breitenberger
- Language: German
- Year: 2007
- Author: Barbara Breitenberger
- Language: English
- Year: 2007
- Author: Barbara Breitenberger
- Language: English
- Year: 2007
- Author: Barbara Breitenberger
- Language: English
- Year: 2007