1. Anonymous (1989) Cotton: Review of world situation. Bull Int Cotton Advis Comm 42:1–15
2. Balls WL (1912) The cotton plant in Egypt. Macmillan, London
3. Bourdon C (1986) Enzymatic polymorphism and genetic organization of two cotton tetraploid cultivated species, G. hirsutum and G. barbadense. Cotton Fibres Trop 41:191–210
4. Doebley JF (1989) Isozyme evidence and the evolution of crop plants. In: Soltis DE, Soltis PS (eds) Isozymes in plant biology. Dioscorides Press, Portland/OR (in press)
5. Feaster CV, Turcotte EL (1962) Genetic basis for the varietal improvement of Pima cottons. Crops Re, USDA-ARS 34-31, pp 1–15