Al- badri, Ahmed Mahdi Saleh. “Histological and Immunohistochemistry Studies of Syrinx Calcification in the Laying Hens (Gallus Gallus Domesticus)”. Kufa Journal For Veterinary Medical Sciences, vol. 7, no. 1B, Oct. 2016, pp. 238-4, doi:10.36326/kjvs/2016/v7i1B4252.