Basson, P.A.; Miller, E.S.; Kellerman, T. Stephanus; Albl, P.; Von Maltitz, L.J.F.; Welman, Wilhelmina G.(Published by The Government Printer, Pretoria, 1975)
Kellerman, T. Stephanus; Maartens, B.P.; Schultz, R.A. (Rowena Anitra); Swart, D. Petro(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
Miles, Christopher O.; Wilkins, A.L.; Erasmus, G.L.; Kellerman, T. Stephanus(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)