1. Reconnaissance isotopic investigations in the Namaqua Mobile Belt and implications for Proterozoic crustal evolution;Barton;Upington Geotraverse. Spec. Publ. Geol. Soc. S. Afr.,1983
2. Evidence for late Precambrian plate tectonics in West Africa;Black;Nature,1979
3. The Namaqua Tectonic Province in South West Africa;Blignault;Precam. Res. Unit. Univ. Cape Town, Bull.,1974
4. Models for the geotectonic evolution of the middle to late Precambrian Namaqua Mobile Belt in eastern Namaqualand, South Africa;Botha;Precam. Res.,1979
5. Radiometric age measurements on rocks from southern Africa to the end of 1971;Burger;Geol. Surv. S. Afr. Bull.,1973