1. Pleistocene ‘periglacial’ phenomena in southern Africa;Butzer;Boreas,1973
2. Pollen analytical studies in East Africa and South Africa;Coetzee;Palaeoecology of Africa,1967
3. De Villiers , J.M. 1962 A Study of Soil Formation in Natal
4. Periglacial evidence in southern Africa during the Pleistocene epoch;Harper;Palaeoecology of Africa,1969
5. A contibution to the periglacial morphology of Lesotho, Southern Africa;Hasenstrath;Biuletyn Periglacjalny,1972