Wanjohi, J.M.; Ngeranwa, J.N.; Rumberia, R.M.; Muraguri, G.R.; Mbogo, S.K.(Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)
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)