Rini, Intan D W S, Adrian Gunawan, and A. Ibnu Arobi. “Pengujian Logam Berat Pada Tanah Terkontaminasi Air Limbah PLTD Di Petung, Kalimantan Timur”. SPECTA Journal of Technology 2, no. 2 (November 27, 2019): 19–26. Accessed July 17, 2024. https://journal.itk.ac.id/index.php/sjt/article/view/103.