Mushi, E.Z.; Binta, M.G.; Chabo, R.G.; Mathaio, M.; Ndebele, R.T.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)
Stenson, M.O.; Van der Merwe, J.S.; Vorster, R.J.; Viljoen, P.G.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)
Bingham, J.; Foggin, Chris M.; Wandeler, A.I. (Alexander I.); Hill, F.W.G.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)
Muraguri, G.R.; Gitau, P.K.; Mwangi, Michael N.; Mbogo, S.K.; Kariuki, D.P.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)