Efficacy of commercial vaccines against the prevalent strains of Newcastle disease and avian influenza (h9n2) infections in broilers in Pakistan
I. Irshad, A. Aslam, M.Y. Tipu, K. Ashraf, B. Zahid, A. Irshad
Efficacy of commercial vaccines against the prevalent strains of Newcastle disease and avian influenza (h9n2) infections in broilers in Pakistan
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