Widyastuti M, Jayanto GD, Irshabdillah MR. WATER QUALITY ANALYSIS OF CODE RIVER BASED ON METAL AND NONMETAL PARAMETERS USING HEAVY METAL POLLUTION INDEX. JG [Internet]. 2021 Jun. 3 [cited 2025 Aug. 25];13(2):145-58. Available from: https://jurnal.unimed.ac.id/2012/index.php/geo/article/view/20000