MAYAHI M, SHAPOURI MRS, DARABI GG. Effect of time vaccination on immunization of broiler chicks against influenza A subtype H9 N2 virus. Indian J of Anim Sci [Internet]. 2011 Jan. 14 [cited 2025 Oct. 23];76(1). Available from: https://epubs.icar.org.in/index.php/IJAnS/article/view/3489