Parvin, A, and S Hoque. “Removal of Pb and Zn from Industrial Effluent Using Humic Acid”. Bangladesh Journal of Scientific and Industrial Research 51, no. 4 (December 10, 2016): 279–284. Accessed April 15, 2025. https://banglajol.info/index.php/BJSIR/article/view/30447.