- Author: Konrad Knopp
- Language: German
- Year: 1963
- Author: Konrad Knopp
- Language: German
- Year: 1955
- Author: Konrad Knopp
- Language: German
- Year: 1971
- Author: Konrad Knopp
- Language: German
- Year: 1966
- Author: Konrad Knopp
- Language: German
- Year: 1959
- Author: Konrad Knopp
- Language: German
- Year: 1965
- Author: Konrad Knopp
- Language: English
- Year: 2016
- Author: Konrad Knopp
- Language: Polish
- Year: 1956
- Author: Konrad Knopp
- Language: English
- Year: 1956
- Author: Konrad Knopp Frederick Bagemihl
- Language: English
- Year: 1945