Downey Mildew nature of resistanc

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Abd EL-Hafez, A. A., S.A.Shehata, and M.M.W.Awad, " Inheritance of Downey Mildew disease and its nature of resistance in, ", Annals of Agric. Sc.,Moshtohor, vol. 3, issue 28, pp. :1681-1697 , 1990.