1. The possibility of a Salt Industry in Nigeria;Beltaro;Geol. Surv. Nigeria, Report no 1491,1971
2. Structure et évolution géodynamique du bassin intracontinental de la Bénoué (Nigeria);Benkhelil,1986
3. The geology and geography of Nigeria;Falconer,1911
4. A preliminary description of the Nigerian Lead-Zinc field;Farrington;Econ. Geol.,1952
5. The Economic Mineral Resources of the Benue Trough;Ford;Earth Evol. Sci.,1982