Ghafil, Abbas H., and Rasha S. Obaid. “ Biochemical and Some Enzyme of Frisian- Holstein Bull”. Journal of Kerbala for Agricultural Sciences 5, no. 1 (March 28, 2018): 21–29. Accessed May 6, 2024. https://journals.uokerbala.edu.iq/index.php/Agriculture/article/view/144.