References
- King , L. C. 1942 . South African scenery , Edinburgh : Oliver & Boyd .
- Moon , B. P. and Dardis , G. F. , eds. 1998 . The geomorphology of Southern Africa , Johannesburg : Southern .
- Wellington , J. H. 1955 . Southern Africa – A geographical study. Vol. 1: Physical geography , Cambridge : Cambridge University Press .