
- Author: Gertrud Steinbach (auth.)
- Language: German
- Year: 1926

- Author: Gerhard Schneider (auth.)
- Language: German
- Year: 1940

- Author: Karl Wilhelm Neumann (auth.)
- Language: German
- Year: 1941

- Author: Ernst Hadorn (auth.)
- Language: German
- Year: 1932

- Author: August Hirt (auth.)
- Language: German
- Year: 1921