El-Samee , Laila D. Abd, Hewida M.H. El-Allawy, and Nagwa A. Maghraby. 2012. “Comparative Study on Some Productive Traits of Muscovy and Sudani Ducks in Egypt”. International Journal of Poultry Science 11 (4): 264–268. https://doi.org/10.3923/ijps.2012.264.268.