- Author: Krümmel Hans-Jacob, Rehm Hannes, Simmert Diethard B.
- Language: German
- Year: 1991
- Author: Ehrlicher Werner, Simmert Diethard B.
- Language: German
- Year: 1988
- Author: Ehrlicher Werner, Simmert Diethard B.
- Language: German
- Year: 1982
- Author: Ehrlicher Werner, Simmert Diethard B.
- Language: German
- Year: 1985