1. The Cenomanian hiatus in the Southern Benue trough;Amajor;Geol. Mag.,1985
2. Retention of Cu and Zn by Montmorillonite;Bingham,1964
3. Origin of Sedimentary Rocks;Blatt,1972
4. Data of Geochemistry;Clarke,1924
5. A preliminary description of the Nigerian LeadZinc field;Farrington;Economics, Geology,1952