1. History of Human Lifespan and Mortality;Acsádi,1970
2. The Cambridge Encyclopedia of Human Paleopathology;Aufderheide,1998
3. Die vestiging van die Voortrekkers noord van die Vaalrivier tot 1840;Berg;Historia,1992
4. Stone kraal settlements in South Africa;Breutz;Afr Stud,1956
5. A History of the Batswana and Origin of Bophuthatswana;Breutz,1986