K Usman, R. Abdullahi, Z. I. Muhammad, and A. Galadima. “A Perspective on the Catalytic Treatment of Tannery Wastewater”. International Journal of Science for Global Sustainability 8, no. 2 (July 13, 2022): 8. Accessed November 18, 2025. https://www.fugus-ijsgs.com.ng/index.php/ijsgs/article/view/335.