1. Anonymous, 1992. Distribution and Impact of Helminth Diseases of Livestock in Developing Countries. FAO Animal Production and Health Paper 96. Food and Agriculture Organization of the United Nations. Rome, 1992, p. 221.
2. FAO Animal Production Yearbook;Anonymous,1997
3. Anonymous, 1997b. Biological Control of Gastro-intestinal Nematodes of Ruminants using Predacious Fungi. Workshop Proceedings, Ipoh, Malaysia. FAO Animal Production and Health Paper No. 141, p. 94.
4. Anonymous, 1999. Integrated Sustainable Parasite Control of Ruminants in Mixed Farming Systems in Kenya FAO, p. 55.
5. Anonymous, 2000. SparC Newletter No. 2, February 2002.