Abd El-Maksoud Hassan, H., Ahmed Fadl, H., Aly Ghoniemy, W. (1998). 'HOST SPECIFIC CROSS PROTECTION USING PASTEURELLA MULTOCIDA BACTERIN PREPARED FROM IN-VIVO PROPAGATED STRAIN', Assiut Veterinary Medical Journal, 39.2(78), pp. 145-156. doi: 10.21608/avmj.1998.183202