Ibe C, Onyeanusi B, Salami S, Umosen A, Maidawa S. Studies of the Major Respiratory Pathways of the West African Guinea Fowl (Numida meleagris galeata): the Morphometric and Macroscopic Aspects. Int. J. Poult. Sci. 2008;7(10):997–1000. doi:10.3923/ijps.2008.997.1000