Al-Ankari, Abdul-Rahman S., M.A. Al-Ramadan, and M.M. El-Demerdash. 2004. “Risk Factors Associated With Prevalence of Swollen Head Syndrome (SHS) in Broiler Chickens in Eastern Province - Saudi Arabia”. International Journal of Poultry Science 3 (10): 646–650. https://doi.org/10.3923/ijps.2004.646.650.