1. Ages and isotopic evolution of the Ventersdorp volcanics;Armstrong,1986
2. Radiometric age measurements on rocks from southern Africa to the end of 1971;Burger;Bull. Geol. Surv. Dep. Mines S. Afr.,1973
3. Geological survey of portions of Hopetown, Britstown, Prieska and Hay;Du Toit;Ann. Rep. Geol. Comm. Cape Good Hope,1908
4. The geology of an area around Sodium, Britstown District, Northern Cape;Emslie,1972
5. A re-examination of the Zoetlief-Ventersdorp relationship at the T'Kuip Hills, Britstown District;Grobler;Ann. Geol. Surv. S. Afr.,1975