Gebrearegay, A., M. Tesfaye, and A. Gizaw. “Fixed-Bed Column Cr(VI) Removal by Acid-Modified Cordia Africana Sawdust from Synthetic and Industrial Wastewater”. Ethiopian Journal of Science and Sustainable Development, Vol. 13, no. 2, Aug. 2026, pp. 71-87, doi:10.20372/ejssdastu:v13.i2.2026.1278.