1. Abel N O J 1973. The distribution of the larger mammals in the Luangwa alluvial zone. In: Luangwa conservation and development project, Zambia. Game management and habitat manipulation, Part III. FAQ/UNDP, Rome. Atlas jeune Afrique 1973.
2. Bell R H V 1969. The use of the herb layer by grazing ungulates in the Serengeti National Park, Tanzania. PhD Thesis. University of Manchester.
3. Bell R H V 1971. A grazing ecosystem in the Serengeti. Scientific American 224, 86–93.
4. Bell R H Y 1973. An African grazing system and its exploitation. Occasional paper of the Animal Production Society of Kenya. 31 pp.
5. Billing D W and M S McCullagh 1977. Computer printed soil fertility maps - an aid to land evaluation and soil management in Malawi. Unpublished report to the Ministry of Agriculture and Natural Resources, Malawi. Cyclostyled report. 16 pp.