HEAVY METALS CONCENTRATION IN RIVER AND PUMPING WELL WATER FOR RIVER BANK FILTRATION (RBF) SYSTEM: CASE STUDY IN SUNGAI KERIAN. JT [Internet]. 2015 Jun. 25 [cited 2024 Jul. 23];74(11). Available from: https://journals.utm.my/jurnalteknologi/article/view/4861