1. Addy, B. L. &Thomas, D. (1977a).Tropical Animal Health and Production,9, 99–106.
2. Brown, P. &Young, A. (1965).The Physical Environment of Central Malawi. Government Printer, Zomba, 93 pp.
3. Miford, R. &Minson, D. J. (1966). The feeding value of tropical pastures. InTropical Pastures (ed. William Davies & C. L. Skidmore), pp. 106–114, Faber and Faber, London.
4. Rodel, M. G. W. &Boultwood, J. N. (1967).Rhodesia Agricultural Journal,64, 16–20.
5. Stobbs, T. H. (1969).Tropical Agriculture,46, 187–194.