Shaker , A. S.; Amin, Q. A.; Akram, S. A.; Kirkuki, S. M.; Talabani, R. S. B.; Mustafa, N. A.; Mohammed, M. S. Using Principal Component Analysis to Identify Components Predictive of Shape Index in Chicken, Quail and Guinea Fowl. Int. J. Poult. Sci. 2019, 18 (2), 76–79. https://doi.org/10.3923/ijps.2019.76.79.