Fitria Sari, Dwi, Taufik Hamdani, Syelvialousiana Kalauw, Rina Ermawati, Rudi Kartika, and Slamet Hadi Raharjo. 2026. “Integration of Multi-Index Method and Qual2kw Evaluation Modeling of Quality Status and Pollutant Dispersion Pattern of Perian River in Kutai Kartanegara”. Jurnal Beta Kimia 6 (1), 75-85. https://doi.org/10.35508/jbk.v6i1.28211.