Roshdy, S. , Soliman, R. , Aly, M., Omar, L., Sameer, A., Abo-Elyazeed, H. and Aboul-Ella, H. 2023. Preparation of a Newly Developed Trivalent Pasteurella multocida, Avibacterium paragallinarum, and Ornithobacterium rhinotracheale Vaccine with an Evaluation of its Protective Efficacy in Chickens. Journal of Advanced Veterinary Research. 13, 5 (Jun. 2023), 737-742.