Kedir, Kassim, Abera Gure, and Fuad Abduro. “Heavy Metals in Sediments of Gilgel Gibe I Hydroelectric Dam Reservoir and Its Tributaries”. Ethiopian Journal of Education and Sciences 15, no. 1 (February 27, 2020): 18-28. Accessed June 4, 2020. http://journals.ju.edu.et/index.php/ejes/article/view/1117.