Abdul Karim, M. F. ., K. . Hambali, A. Y. . Sow, N. H. Hassin, M. A. . Abas, A. N. . Muhamad Nor, A. . Amir, and L. . Ismail. “Preliminary Study on Copper, Zinc and Iron Concentration in Soils from Waste Dumping Site in Tanah Merah, Kelantan, Malaysia”. Journal of Tropical Resources and Sustainable Science (JTRSS), vol. 8, no. 1, June 2020, pp. 12-16, doi:10.47253/jtrss.v8i1.158.