“HEAVY METALS CONCENTRATION IN RIVER AND PUMPING WELL WATER FOR RIVER BANK FILTRATION (RBF) SYSTEM: CASE STUDY IN SUNGAI KERIAN”. Jurnal Teknologi 74, no. 11 (June 25, 2015). Accessed July 23, 2024. https://journals.utm.my/jurnalteknologi/article/view/4861.