Asres, M., A. Wachiso, F. Bisrat, T. Tadesse, L. Kidanne, B. Asegdew, A. Asress, and F. Tessema. “Immunization Service providers’ Knowledge, Attitude and Practice in Primary Health Care Units in Pastoral and Semipastoral Areas of Ethiopia: CORE Group Polio Project”. The Ethiopian Journal of Health Development, vol. 33, July 2019, https://ejhd.org/index.php/ejhd/article/view/2422.