Krithiga, K., S. S. Devi, Surya Shankar, P. S. Reshma, M. J. Abraham, and Divakaran Nair. “Concurrent Infection of Infectious Bronchitis (IB) and Sub-Clinical Infectious Bursal Disease (IBD) in an Organised Poultry Farm”. International Journal of Livestock Research 9, no. 7 (July 31, 2019): 261–266. Accessed July 6, 2026. http://ijlr.org/ojs_journal/index.php/ijlr/article/view/1209.