Khan, KT, MTA Chowdhury, and SM Imamul Huq. “Effects of Biochar on the Fate of the Heavy Metals Cd, Cu, Pb and Zn in Soil”. Bangladesh Journal of Scientific Research 28, no. 1 (January 4, 2016): 17–26. Accessed August 16, 2024. https://banglajol.info/index.php/BJSR/article/view/26240.