“Pemetaan Sebaran Kadar Besi Pada Endapan Laterit Nikel Menggunakan Metode Interpolasi Indikator Kriging Dan Ordinary Kriging: Mapping The Distribution of Iron Content in Nickel Laterite Deposits Using Indicator Kriging and Ordinary Kriging Interpolation Method”. PROMINE 9, no. 1 (September 22, 2021): 29–36. Accessed May 4, 2026. https://journal.ubb.ac.id/index.php/promine/article/view/2316.