Sumpala AGT, Alkas TR, Layuk CPT, Noorhamsyah, Intan Nur Aini, Fitriani E, et al. Analysis of Water Quality around Samarinda State Agricultural Polytechnic with Parameters of TDS, pH, COD, Fe, and Zn. buletinloupe [Internet]. 2025 Jun. 28 [cited 2025 Jun. 30];21(01):21-6. Available from: https://e-journal.politanisamarinda.ac.id/index.php/jurnalloupe/article/view/3252