de Graaff, G.

• Vol 16, No 1 (1973) - Original Research
  A habitat map of the Kalahari Gemsbok National Park
  Abstract  PDF
• Vol 17, No 1 (1974) - Original Research
  Notes on the occurrence of rodents in South African National Parks
  Abstract  PDF
• Vol 21, No 1 (1978) - Short Communication
  Notes on the Southern African black-tailed tree rat thallomys paedulcus (Sundevall, 1846) and its occurrence in the Kalahari Gemsbok National Park
  Abstract  PDF