1. FAO (1985). FAO Production Yearbook,39, 227.
2. Systems study;ILCA,1979
3. Matthewman, R. W. (1980).Tropical Animal Health and Production,12, 234–242.
4. Ndamukong, K. J. N. (1987). Sheep and goat production in the North West Province of Cameroon with special reference to parasitic gastro-enteritis. PhD Thesis, University of Edinburgh.
5. Ndamukong, K. J. N., Sewell, M. M. H. &Asanji, M. J. (1989).Tropical Animal Health and Production. In Press.