- Author: Friedrich Hoffmann (auth.)
- Language: German
- Year: 1975
- Author: Dr. Friedrich Hoffmann (auth.)
- Language: German
- Year: 1976
- Author: Dr. Friedrich Hoffmann (auth.)
- Language: German
- Year: 1976
- Author: Prof. Dr. Friedrich Hoffmann (auth.) Prof. Dr. Friedrich Hoffmann (eds.)
- Language: German
- Year: 1982