Biyana, Melkamu. “Level of Selected Precedence Pollutants in Soils of the Industrial Regions of Welmera District (Oromiya Special Zone Around Finfinne), Ethiopia”. Journal of Science and Development 2, no. 2 (July 1, 2021): 123-136. Accessed September 19, 2024. https://journals.hu.edu.et/hu-journals/index.php/agvs/article/view/71.