(74)Effect of age and certain microadditives on the reproductive capacity of Dokki-4 cockerels. Research Authors Osman, A.M., H.Y. El-Hammady and M.N. Makled Research Journal Assiut Vet. Med. Journal, 1: 1 and 2, 257-267, 1974. Research Rank 2 Research Year 1974
