Elagib, H.A. and Elzubeir, E. 2012. The Hummoral Immune Response of Heat Stressed Broiler Chicks Fed Different Levels of Energy and Methionine. International Journal of Poultry Science. 11, 6 (May 2012), 400–404. DOI:https://doi.org/10.3923/ijps.2012.400.404.