- Author: Bernt Engelmann
- Language: German
- Year: 1970
- Author: Bernt Engelmann
- Language: German
- Year: 1979
- Author: Bernt Engelmann
- Language: German
- Year: 1989
- Author: Bernt Engelmann
- Language: German
- Year: 1970
- Author: Bernt Engelmann
- Language: German
- Year: 1977
- Author: Bernt Engelmann
- Language: German
- Author: Bernt Engelmann
- Language: German
- Year: 1992