Mohammed, Ahmed Jassim, and Qassim Haleem Kshash. “Comparative Study of Serum Copper Concentration in Natural Copper Deficient and Healthy Awassi Sheep in Al-Najaf city\Iraq”. Kufa Journal for Veterinary Medical Sciences, vol. 6, no. 2, Dec. 2015, pp. 8-16, https://doi.org/10.36326/kjvs/2015/v6i24000.