- Author: Dr. Hermann Hager (auth.) Dr. Hermann Hager (eds.)
- Language: German
- Year: 1884
- Author: Dr. Hermann Hager (auth.)
- Language: German
- Year: 1877
- Author: Dr. Hermann Hager (auth.) Dr. Hermann Hager (eds.)
- Language: German
- Year: 1883
- Author: Dr. Hermann Hager (auth.)
- Language: German
- Year: 1885