Marasas, Walter F.O. (Walter Friedrich Otto); Adelaar, T.F.; Minne, J.A.; Van Rensburg, I.B.J.; Burroughs, G.W.; Kellerman, T. Stephanus(Published by the Government Printer, Pretoria, 1972)
Miles, Christopher O.; Wilkins, A.L.; Erasmus, G.L.; Kellerman, T. Stephanus(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
Van der Merwe, W.J.J.; Eicker, A.; Marasas, Walter F.O. (Walter Friedrich Otto); Kellerman, T. Stephanus(Published by The Government Printer, Pretoria, 1979)
Miles, Christopher O.; Wilkins, A.L.; Erasmus, G.L.; Kellerman, T. Stephanus(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
Pienaar, J. G.; Van der Westhuizen, G.C.A.; Anderson, L.A.P.; Naude, T.W.; Kellerman, T. Stephanus(Published by The Government Printer, Pretoria, 1976)