
- Author: Karl Keil (auth.)
- Language: German
- Year: 1938

- Author: W. Dammann (auth.)
- Language: German
- Year: 1937

- Author: A. Agricola (auth.)
- Language: German
- Year: 1937

- Author: Dr.-Ing. Willy Arlt (auth.) Willy Arlt (eds.)
- Language: German
- Year: 1912

- Author: Wolf v. Engelhardt (auth.)
- Language: German
- Year: 1960