Joshi, Sahira. “Comparative Study on the Adsorption Capacity of Activated Carbon Prepared from Lapsi Seed Stone and Betel Nut Using Phosphoric Acid”. Journal of the Institute of Engineering 13, no. 1 (June 22, 2018): 153–159. Accessed November 21, 2024. https://nepjol.info./index.php/JIE/article/view/20361.