Christica, IS, and R Julia. “ACTIVATED CARBON UTILIZATION FROM CORN COB (Zea Mays) AS A HEAVY METAL ADSORBENT IN INDUSTRIAL WASTE”. Asian Journal of Pharmaceutical Research and Development 6, no. 5 (October 18, 2018): 1–4. Accessed September 12, 2025. https://www.ajprd.com/index.php/journal/article/view/411.