- Author: Alfred W. Sellin
- Language: German
- Year: 1885
- Author: Ernst Otto Hopp
- Language: German
- Year: 1886
- Author: Ernst Otto Hopp
- Language: German
- Year: 1885
- Author: Ernst Otto Hopp
- Language: German
- Year: 1884
- Author: Hermann Brosien
- Language: German
- Year: 1887