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El-Sayed, E. , Mona, M. , Y., Y. , Mahrous, U.. "Influence of Overfeeding on Productive Performance Traits, Foie Gras Production, Blood Parameters, Internal Organs, Carcass Traits, and Mortality Rate in Two Breeds of Ducks". World Academy of Science, Engineering and Technology, Open Science Index 75, International Journal of Animal and Veterinary Sciences (2013), 7(3), 220 - 226.