Naeem, Ismat, Hifsa Mubeen, and Abida Taskeen. “Determination of Heavy Metal Contents of Some Over the Counter Staple Food Items”. Asian Journal of Chemistry 22, no. 4 (March 30, 2010): 2861–2868. Accessed November 25, 2024. https://asianpubs.org/index.php/ajchem/article/view/11488.