Gilchrist, Frances M.C.; Liebenberg, H.; Van der Merwe, Christiaan F.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1998)
Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Vermeulen, N.M.J.(Published by the Government Printer, Pretoria., 1987)
Malan, F.S.; Wessels, C.D.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)
Van Der Made, H.N.; Van Staden, J.J.; Du Toit, J. de V.; Jordaan, E.; Barrett, E.L.; Coetzee, J.D.(Published by the Government Printer, Pretoria., 1980)