Solomon Abrha, Rahel Assefa, Fantahun Molla, Abrham Wondimu, and Admassu Assen. 2015. “Antibiotics Utilization and Their Cost in Ayder Referral Hospital, Mekelle, Ethiopia”. Global Journal of Medical Research 15 (B1):1-7. https://medicalresearchjournal.org/index.php/GJMR/article/view/872.