“Comparative Anatomical and Histological Study of Gall Bladder in Mallard (Anas Platyrhynchos) and Broiler Fowl (Gallus Gallus )”. University of Thi-Qar Journal of Agricultural Research, vol. 12, no. 2, Oct. 2023, pp. 15-25, https://doi.org/10.54174/utjagr.v12i2.254.