- Author: John O. Hunwick, Rex Séan O'Fahey, Razaq Abubakre, Hamidu Bobboyi, Roman Loimeier, Stefan Reichmuth, Muhammad Sani Umar
- Language: English
- Year: 1995
- Author: John O. Hunwick, Rex S. O'Fahey
- Language: English
- Year: 1994
- Author: John O. Hunwick
- Language: English
- Year: 2006
- Author: John O. Hunwick, Ousmane Kane, Bernard Salvaing, Rüdiger Seeseman, Mark Sey, Ivor Wilks
- Language: English
- Year: 2003
- Author: John O. Hunwick
- Language: English
- Year: 2003