Jafar Ahamed, A., and N. Balasubramanian. “Characterization and Exploration of Lignite for the Adsorption of lead(II) Ions”. Asian Journal of Chemistry 11, no. 3 (March 30, 2010): 1087–1088. Accessed November 29, 2024. https://asianpubs.org/index.php/ajchem/article/view/23440.