Mehari Tesfaye, Robel, Fana Teklemariam, Hailemariam Aweke, and Hailemariam Gebregwergis. 2022. “Synthesis and Characterization of Silica from Awash Melkaasa Chemical Factory Waste”. Ethiopian Journal of Science and Sustainable Development 9 (2), 62-67. https://doi.org/10.20372/ejssdastu:v9.i2.2022.483.