Gebreyohannes, T., & Gebrekidan, A. (2025). Toxicological assessment of Pb, Cd and Cr in lettuce and onion grown around Ellala River in Mekelle, Tigray, Ethiopia. Ethiopian Journal of Science and Technology, 11(3), 287-313. Retrieved from http://journals.bdu.edu.et/index.php/EJST/article/view/2604