1. Zirconium in younger granites of northern Nigeria;Bowden;Geochim. Cosmochim. Acta,1966
2. Geochemical studies on the younger granites of northern Nigeria;Bowden,1976
3. The three ring complexes of Gabal El Kahfa, Gabal Nigrub El Fogani and Gabal El Naga;El-Ramly,1969
4. The alkaline rocks of Southeastern Egypt;El-Ramly;Geol. Surv. Egypt,1971
5. The alkaline ring completes of Egypt;El-Ramly,1980