1. Radiometric age measurements on rocks from Southern Africa to the end of 1971;Burger;Geol. Surv. S. Afr. Bull.,1973
2. Geochemie und Petrogenese archaischer Vulkanite der Pongola-Gruppe in Natal;Hegner;Chem. Erde,1981
3. Geochronologic and Sr-Isotopic studies of certain units in the Barberton Granite-Greenstone Terrane, South Africa;Barton;Geol. Soc. S. Afr. Spec. Publ.,1983
4. Sr-isotope studies on various layered mafic intrusions in Southern Africa;Davies;Geol. Soc. S. Afr. Spec. Publ.,1970
5. Strontium isotopic studies of the mafic and felsic rocks of the Onverwacht Group of the Swaziland Sequence;Allsopp;Geol. Rundsch.,1973