Mehta, Kiran V. “A Study of Adsorption of an Organic Colouring Matter on Powdered Natural Plant Material”. Science, Engineering and Health Studies 7, no. 2 (August 7, 2013): 29–35. Accessed April 29, 2024. https://li01.tci-thaijo.org/index.php/sehs/article/view/9796.