RAJ, G DHINAKAR, T THANGA VELU, K NACHIMUTHU, and A T VENUGOPALAN. 2013. “Passive Haemagglutination Test in the Diagnosis of Infectious Bursal Disease”. The Indian Journal of Animal Sciences 65 (2). https://epubs.icar.org.in/index.php/IJAnS/article/view/31571.