- Author: Manfred Lurker
- Language: German
- Year: 1981
- Author: Manfred Lurker
- Language: English
- Year: 2006
- Author: Manfred Lurker
- Language: German
- Year: 1987
- Author: Manfred Lurker
- Language: English
- Year: 2004
- Author: Manfred Lurker
- Language: English
- Year: 2004