Uddin, MZ, MSR Khan, F Begum, and MA Mannan. “Efficacy Study of Bio-Typhoid® Vaccine Against Fowl Typhoid in Backyard Layer Chicken”. Journal of the Bangladesh Agricultural University 7, no. 2 (April 8, 2010): 295–299. Accessed July 18, 2024. https://banglajol.info/index.php/JBAU/article/view/4737.