- Author: Dipl.-Ing. Herbert Schmidt (auth.)
- Language: German
- Year: 1972
- Author: Dipl.-Ing. Herbert Schmidt (auth.)
- Language: German
- Year: 1964
- Author: Dipl.-Ing. Herbert Schmidt (auth.)
- Language: German
- Year: 1966
- Author: Edith Schirmer Dipl.-Ing. Herbert Schmidt (auth.)
- Language: German
- Year: 1961