Igwe, O. A., Ezema, S. W., Eze, C. D., & Okoye , O. J. (2014). Experimental Velogenic Newcastle Disease Can Be Very Severe and Viscerotropic in Chickens but Moderate and Neurotropic in Guinea Fowls. International Journal of Poultry Science, 13(10), 582–590. https://doi.org/10.3923/ijps.2014.582.590