Yusuf, H. B., Yahaya, M. S., Goniwa, A. B., Duwa, H. Egg quality factors of laying chickens fed different combinations of levels of energy and protein in the Northern Guinea Savannah zone of Nigeria. Nig. J. Anim. Sci. Technol [Internet]. 2020Aug.16 [cited 2025Nov.5];3(2):246 -252. Available from: http://njast.com.ng/index.php/home/article/view/100