Ker, James A.; Webb, E.C. (Edward Cottington); Van Papendorp, D.H. (Dirk Hermanus), 1949-(Agricultural Research Council, ARC-OVI and the University of Pretoria, 2009-12)
Du Toit, Peet J.; Kruger, P.E. (Pieter Ernst); De Wet, K.B.; Van Vuuren, Bernard J.; Joubert, Annie M.; Lottering, Mona-Liza; Van Wyk, Gerrit J.U.(Africa Association for Health, Physical Education, Recreation, Sport and Dance, 2006-03)