Additional bibliography for study
1. Kalloo G. and Bergh B.O. (1993). Genetic improvement of vegetable crops. Pergamon press.Oxford.
2. Bassett M.J. (1986). Breeding vegetable crops.Avi publishing company.
3. Jaime Prohens and Fernando Nuez (2008). Vegetables I: Asteraceae, Brassicaceae, Chenopodicaceae, and Cucurbitaceae. Handbook of Plant Breeding ,Springer.
4. Jaime Prohens and Fernando Nuez (2008). Vegetables II: Fabaceae, Liliaceae, Solanaceae, and Umbelliferae. Handbook of Plant Breeding ,Springer