1. Burg, R.W., Miller, B.M., Baker, E.E., Birnbaum, J., Curie, S.A., Hartman, R., Kang, Y.L., Monaghan, R.L., Olson, G., Putter, I., Tunac, J.B., Wallick, H., Stapley, E.O., Oiwa, R. and Omura, S., 1979. Avermectins, new family of potent antihelmintic agents: producing organism and fermentation. Antimicrobial Agents and Chemotherapy, 15: 361?367.
2. Chema, S., 1984. Public sector responsibility in tick control programme. In: FAO seminar on African Centres for Tick and Tick-borne Disease control, p. 11.
3. Chogo, J.B. and Crank, G., 1981. Chemical composition and biological activity of the Tanzanian plant Ocimum suave. J. Nat. Prod., 44: 308?311.
4. Cremlyn, R., 1978. Pesticides, preparation and mode of action. J Wiley and Sons, New York. pp. 39?49.
5. Dipeolu, O.O., 1991. Current approach to control of ticks on livestock at the ICIPE, Kenya. In: F.Dusbabek, and Bukva, V. (eds), Modern Acarology, 1: 219?228. Academia, Prague.