Amen, Omar, Abeer H.M. El Hendy, Wael K. Elfeil, and Abeer G. Hussein. “Evaluating the Efficacy of Commercial Escherichia Coli Killed Vaccine in Broiler Chickens”. Journal of Advanced Veterinary Research 13, no. 6 (July 27, 2023): 1037-1043. Accessed May 19, 2024. https://advetresearch.com/index.php/AVR/article/view/1350.