- Author: Doug Cooper Michael Clancy (auth.) Gerd Harbeck Tonia Schlichtig (eds.)
- Language: German
- Year: 2003
- Author: Doug Cooper Michael Clancy (auth.)
- Language: German
- Year: 1991
- Author: Doug Cooper Michael Clancy (auth.)
- Language: German
- Year: 1988
- Author: Doug Cooper Michael Clancy (auth.)
- Language: German
- Year: 1999