NISA, VIQAR-UN-, RIAZ AHMED, and M. MUHAMMAD. “?DETERMINATION OF HEAVY AND TOXIC METALS Zn, Cd, Pb AND Cu IN VEGETABLES BY VOLTAMETRY”. Biological Sciences - PJSIR 37, no. 1-2 (January 24, 1994): 33–36. Accessed May 16, 2024. https://v2.pjsir.org/index.php/biological-sciences/article/view/2565.