Kidanemariam, Awoke; Hadgu, K.; Sahle, M.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
Mushi, E.Z.; Binta, M.G.; Chabo, R.G.; Mathaio, M.; Ndebele, R.T.(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)