Babiker, M. et al. 2008. Investigations on Nine Flocks Infected with Infectious Bursal Disease Virus (IBDV) in Khartoum State (Sudan) . International Journal of Poultry Science. 7, 3 (Feb. 2008), 285–288. DOI:https://doi.org/10.3923/ijps.2008.285.288.