Rahman, M.B., M.M. Rahman, M. Rahman, S.M.L. Kabir, K.H.M.N.H. Nazir, and M.M. Amin. 2004. “Efficacy of V4HR Newcastle Disease (V4HR-ND) Vaccine in Broiler Birds in Bangladesh”. International Journal of Poultry Science 3 (5): 365–368. https://doi.org/10.3923/ijps.2004.365.368.