Keet, D.F.; Kriek, N.P.J.; Bengis, Roy G.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)
Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van Amstel, S.R.(Published by the Government Printer, Pretoria., 1987)
Hove, T.; Kanhai, G.K.; Masaka, S.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)