Mohamad Mahani , Norul Ahsanah Aulia, and Nuramidah Hamidon. “Eggshell Powder As an Adsorbent for Removal of Lead (II) in Panchor’s River”. Journal of Advanced Industrial Technology and Application, vol. 2, no. 2, Dec. 2021, pp. 42-49, https://publisher.uthm.edu.my/ojs/index.php/jaita/article/view/9523.