
- Author: Dipl.-Ing. H. R. Trenkler (auth.)
- Language: German
- Year: 1923

- Author: Eduard Köhler (auth.)
- Language: German
- Year: 2002

- Author: Eduard Köhler (auth.)
- Language: German
- Year: 2001

- Author: Eduard Köhler (auth.)
- Language: German
- Year: 1998

- Author: Hanz Richter (auth.)
- Language: English
- Year: 2012