Jassim , Suaad Shnawa, and Hamza Mizail Hawa. “Effect of Interleukin -6 Level on Reproductive Performance in Holstein Cows ”. Kufa Journal for Agricultural Sciences, vol. 15, no. 2, Dec. 2023, pp. 28-32, https://doi.org/10.36077/kjas/2023/v15i2.3860.