South African Society for Greek Philosophy and the Humanities; Gericke, J.D. (John Daniel)(South African Society for Greek Philosophy and the Humanities, 2001)
Pistorius, Pierre Anton; Taylor, F.E.; Bester, Marthan Nieuwoudt; Hofmeyr, G.J. Greg (Gordon John Gregory); Kirkman, Steve P. (Stephen Patrick)(Zoological Society of Southern Africa, 2008-04)
Jibba, K.B.; Duvel, G.H. (Gustav Heinrich)(South African Society for Agricultural Extension, Department of Agriculture, Ecomomics, Extensions and Rural Development, University of Pretoria, 2008)
Steenkamp, Gerhardus; Ferguson, Jan Willem Helenus; Boy, Sonja Catharina; Ferreira, Sam M.; Bester, Marthan Nieuwoudt(South African Veterinary Association, 2008-03)