1. D. J. ALLEN (1983 ). The Pathology of Tropical Food Legumes. Disease Resistance in Crop Improvement . Wiley-Interscience, New York413 pp.
2. ANON. (1978 ). IITA Research Highlights for 1977 . International Institute of Tropical Agriculture, Ibadan, Nigeria. 71 pp.
3. ANON. (1979 ). Annual Report far 1978 . International Institute of Tropical Agriculture, Ibadan, Nigeria, 129 pp.
4. ANON. (1983 ). IITA Research Highlights for 1982 . International Institute of Tropical Agriculture, Ibadan, Nigeria. 76 pp.
5. The effect of aphid-resistance in cowpea on infestation and development of Aphis craccivora and the transmission of cowpea aphid-borne mosaic virus