The occurrence and chemical composition of Gypsum at Cham in the yola arm of the upper bene through N. E. Nigeria Y D Mamman D M Orazulike S T Ndaye DOI: 10.4314/gjpas.v13i4.16758 Abstract No Abstract.GJPAS Vol. 13 (4) 2007: pp. 563-569 PDF Published 2008-01-14 Issue Vol. 13 No. 4 (2007) Section Articles © 2018. This work is licensed under the creative commons Attribution 4.0 International license.