Zeleke, A., Gelaye, E., Sori, T., Ayelet, G., Sirak, A., & Zekarias, B. (2005). Investigation on Infectious Bursal Disease Outbreak in Debre Zeit, Ethiopia. International Journal of Poultry Science, 4(7), 504–506. https://doi.org/10.3923/ijps.2005.504.506