Mousa, B.H., and A.J. AL-Rawi. “Effect of Adding Locally Probiotic and Cupric Sulphate to Laying Hens Diets on the Performance , Egg Yolk Cholesterol and Blood Biochemical Parameters”. Journal of Kerbala for Agricultural Sciences 2, no. 4 (December 1, 2015): 1–20. Accessed May 17, 2024. http://journals.uokerbala.edu.iq/index.php/Agriculture/article/view/69.