- Author: Dr. Siegfried Müller-Markus (auth.)
- Language: German
- Year: 1960
- Author: Dr. Siegfried Müller-Markus (auth.)
- Language: German
- Year: 1966
- Author: Dr. Siegfried Müller-Markus (auth.)
- Language: German
- Year: 1966
- Author: Dr. Siegfried Müller-Markus (auth.)
- Language: German
- Year: 1960