Mehret, M., L. Khodakevich, D. Zewdie, and B. Shanko. “PREV ALENCE OF HIV -1 INFECTION AMONG OUT PATIENTS OF ASSELA TOWN, ETHIOPIA, 1989”. The Ethiopian Journal of Health Development, vol. 4, no. 2, June 2017, https://ejhd.org/index.php/ejhd/article/view/1250.