Chihobo, CH, S Kumar, PK Kuipa, and DJ Simbi. “Physical and Chemical Characterization of Acid Tar Waste from Crude Benzol Refining”. Zimbabwe Journal of Technological Sciences (March 17, 2016): 29–42. Accessed October 22, 2026. https://www.ajol.info/index.php/zjts/article/view/132210.