Sawad, A.A. “Morphological and Histological Study of Uropygial Gland in Moorhen (G. Gallinula C. Choropus)”. International Journal of Poultry Science 5, no. 10 (September 15, 2006): 938–941. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/649.