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2. Precambrian events at Sabaloka, near Khartoum, and their significance in the chronology of the basement complex of North-East Africa
3. Ductile shear zones in the northern Red Sea Hills, Sudan and their implication for crustal collision
4. 100 to 200 year solar periodicities
5. Brinkmann K. (1982) Mineral prospecting in the northeast Nuba Mountains southern Kordofan (Federal Institute for Geosciences and Natural Resources (BGR) Report, West Germany, Hannover).