Gebre Yohannes, A., and B. S. Drasar. “SHIGELLA DYSENTERIAE AND SH. FLEXNERI SEROTYPE PREVALENCE AND SEASONAL DISTRIBUTION IN ADDIS ABABA, ETHlOPIA”. The Ethiopian Journal of Health Development, vol. 2, no. 1, July 2017, https://ejhd.org/index.php/ejhd/article/view/1283.