B. Zahid1, A. Aslam, Habib-ur-Rehman, J. I. Qazi, N. Ahmad, C. Ara, R. Akhtar, and U. Bacha. "PATHOGENICITY AND IMMUNOSUPPRESSIVE EFFECT OF DIFFERENT VACCINES OF INFECTIOUS BURSAL DISEASE VIRUS." Journal of Animal and Plant Sciences, vol. 27, no. 4, 2017, pp. 1183-1189.