El-Fatah, W. A., B. M. Ahmed, M. A. A. El-Khaleck, and A. A. El-Sanousi,
"Improved bivalent live and inactivated clone 30 and infectious bronchitis virus vaccine.",
International Journal of Veterinary Science, vol. 9, issue 1: Faculty of Agriculture, Nnamdi Azikiwe University, pp. 50-57, 2020.
Abstract