1. Impaction of rumen with indigestible garbage in cattle and sheep reared within urban and suburban environment;Abdullahi;Nig. Vet. J.,1984
2. Bosha, J.A., 1997. Prevalence of rumino-reticular foreign bodies in goats in the sahel zone. DVM Project Report. Department of Veterinary Surgery and Reproduction, University of Maiduguri, Maiduguri.
3. Nigeria livestock resources survey;Bourn;Wld. Anim. Rev.,1994
4. Carles, A.B., 1983. Sheep Production in the Tropics. Oxford University Press, London, p. 26.
5. Chatfield, C., 1983. Statistics for Technology. A Course in Applied Statistics, 3rd ed. Chapman & Hall, London, pp. 134–196.