1. Lead Isotopes. Minerals, Rock and Inorganic Materials;Doe,1970
2. Radiometric Dating of Intrusives associated with the Waterberg System;Oosthuyzen;Ann. geol. Surv. S. Afr.,1964
3. The Geochronology of a suite of rocks from the granitic terrain surrounding the Barberton Mountain Land;Oosthuyzen,1970
4. Sphene: Uranium-lead ages;Tilton;Science,1968
5. The Geochemistry of uranium in apatite and phosphorite;Altshuler;Geol. Surv. Prof. paper,1958