Elbahi, Samia Ahmed. “Use Of Eggshell As Adsorbent In Elimination Of Pb (Ii) And Cd (Ii) From Aqueous Solutions”. Journal of Progressive Research in Biology 3, no. 3 (November 5, 2018): 200-203. Accessed September 20, 2019. http://scitecresearch.com/journals/index.php/jprb/article/view/1635.