Afzal, F., U. Saliha, N. Fawad, S. Ahmed, Habib-ur-Rehman, J. Munawar, G. Naheed, and B. Siddique. 2015. "ISOLATION, CHARACTERIZATION OF NEWCASTLE DISEASE VIRUS AND COMPARITIVE EFFICACY OF DIFFERENT VACCINE REGIMES IN BROILER BIRDS." Journal of Animal and Plant Sciences 25 (4): 971-976.