Zahraddeen, D., I.S.R. Butswat, D.J.U. Kalla, S.M. Sir, and M.T. Bukar. 2005. “Effect of Frequency of Ejaculation on Semen Characteristics in Two Breeds of Turkeys (Meleagris Gallopavo) Raised in a Tropical Environment”. International Journal of Poultry Science 4 (4): 217–221. https://doi.org/10.3923/ijps.2005.217.221.