FITRIA SARI, D.; HAMDANI, T.; KALAUW, S.; ERMAWATI, R.; KARTIKA, R.; HADI RAHARJO, S. 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, v. 6, n. 1, p. 75-85, 14 maio 2026.