Assessment of Substance Abuse and Associated Factors Among Students of Debre Markos Poly Technique College In Debre Markos Town, East Gojjam Zone, Amhara Regional State, Ethiopia ,2013. GJMR. 2013;13(B4):5-15. Accessed February 5, 2026. https://medicalresearchjournal.org/index.php/GJMR/article/view/377