WAHYUNI, Sri; SUPRIYANTO, Supriyanto; DJAYUS, Djayus. ESTIMASI SEBARAN KUALITAS BATUBARA (ASH CONTENT) MENGGUNAKAN METODE INVERS DISTANCE WEIGHTED (IDW) DAN ORDINARY KRIGING (OK) DI PT. KAYAN PUTRA UTAMA COAL SITE SEPARI, KALIMANTAN TIMUR. GEOSAINS KUTAI BASIN, [S.l.], v. 2, n. 1, apr. 2019. ISSN 2615-5176. Available at: <https://jurnal.fmipa.unmul.ac.id/index.php/geofis/article/view/330>. Date accessed: 17 june 2024. doi: https://doi.org/10.30872/geofisunmul.v2i1.330.