“Evaluation of Cross Protective Efficacy of Commercial Vaccines Against Mannheimia Haemolytica in Mice: Waffa A.Ahmed, Asmaa H. Abdullah, Ansam K. Mohammed and Roua J. Mohammed”. The Iraqi Journal of Veterinary Medicine, vol. 43, no. 1, Aug. 2019, pp. 165-70, https://doi.org/10.30539/iraqijvm.v43i1.487.