REFERENCES
- Kruger , G. P. 1983 . Terrain Morphology Map of Southern Africa , Pretoria : SIRI, Department of Agriculture .
- Partridge , T. C. and Maud , R. R. 1987 . The geomorphic evolution of southern Africa since the Mesozoic . Trans. Geol. Soc. S.A. , 90 ( 2 ) : 179 – 208 .