Pohuang, T., Sirikobkul, N., & Sasipreeyajan, J. (2013). Efficacy of Different Vaccination Programs against Velogenic Newcastle Disease Virus Challenged in 28-day-old Broiler Chickens. The Thai Journal of Veterinary Medicine, 43(3), 391–396. Retrieved from https://he01.tci-thaijo.org/index.php/tjvm/article/view/12274