1. BorlaugN. E., New approach to the breeding of wheat varieties resistant to Puccinia graminis tritici. Phytopathology 43 (1953): 467.
2. Burton, G. J. L., Wheat breeding in Kenya. Bulletin 7 D of Dept. of Agriculture, Kenya, 1929.
3. Campos, T., Report of International Wheat Stem Rust Conference, Winnipeg, 1953. (Mimeographed).
4. Dowson, W. J., Wheat in East Africa. Bulletin No. 4 of Dept. of Agriculture, Kenya, 1929.
5. Hutchinson, J. B., Genetics and the improvement of tropical crops. Text of inaugural lecture, published by Cambridge University Press, 1958, 30 pp.