- Author: Lillian Campbell
- Language: English
- Year: 1967
- Author: Philip A. S. Sedlak
- Language: English
- Year: 1980
- Author: Philip A. S. Sedlak
- Language: English
- Year: 1980
- Author: R. David Paul Zorc
- Language: English
- Year: 1969
- Author: Francis Labu
- Language: English
- Year: 1978
- Author: Saio G. Marah
- Language: English
- Author: Alhaji Sheik Kuyateh Frederick Conteh
- Language: English
- Year: 1989