- Author: Gustav Nachtigal, Allan G. B. Fisher Humphrey J. Fisher Rex S. O'Fahey (trans.)
- Language: English
- Year: 1971
- Author: Gustav Nachtigal
- Language: German
- Year: 1881
- Author: Gustav Nachtigal
- Language: German
- Year: 1889
- Author: Gustav Nachtigal
- Language: German
- Year: 1879