“Performance of Rambutan Seed Extracts As Iron and Manganese Removal in Drinking Groundwater Well in Tanah Merah, Kelantan”. Journal of Tropical Resources and Sustainable Science (JTRSS) 5, no. 2 (December 31, 2017): 79–82. Accessed August 22, 2025. https://journal.umk.edu.my/index.php/jtrss/article/view/596.