Witkowski, E.T.F., University of the Witwatersrand, South Africa

• Vol 47, No 2 (2004) - Original Research
  Harvesting impacts on commonly used medicinal tree species (Catha edulis and Rapanea melanophloeos) under different land management regimes in the Mpumalanga Lowveld, South Africa
  Abstract  PDF
• Vol 48, No 1 (2005) - Original Research
  Height, branch-free bole length and bark thickness for six tree species used medicinally in South Africa
  Abstract  PDF
• Vol 44, No 2 (2001) - Original Research
  An inventory of medicinal plants traded on the western boundary of the Kruger National Park, South Africa
  Abstract  PDF