1. Barrett, J.C., 1992. The economic role of cattle in communal farming systems in Zimbabwe, ODI Pastoral Development Paper 32b, Natural Resources Institute, UK, 35 pp
2. Camus, E., Barre, N., Martinez, D., Uilenberg, G., 1996. Heartwater (cowdriosis). A Review, 2nd edn., Office International des Epizooties, Paris
3. Chamboko, T., 1993. Cattle marketing in the communal areas of Zimbabwe: Factors influencing cattle marketing behaviour, Unpublished M.Phil thesis, Department of Agricultural Economics and Extension, University of Zimbabwe, 177 pp
4. Communal farmers and tick control – A field study in Zimbabwe;Cook;Trop. Anim. Hlth. Prod.,1991
5. Cowdry, E.V., 1925a. Studies on the etiology of heartwater. I. Observation of a rickettsia, Rickettsia ruminantium (n. sp.), in the tissues of infected animals. J. Exp. Med. 42, 253–274