Analisa Kualitas Sumber Air di Kawasan PT Gunung Gajah Abadi Kecamatan Kongbeng Kabupaten Kutai Timur. jpt [Internet]. 2014 Dec. 1 [cited 2026 Sep. 4];2(2):150-9. Available from: https://ojs.mine-cloud.my.id/jpt/article/view/84