Determination of Relative Error in Coal Resource Classification Based On Geostatistical Drill Hole Spacing Analysis: A Case Study of Coal Deposits at Batang Hari, Jambi. Geomine [Internet]. 2022 Aug. 31 [cited 2025 Jun. 28];10(02):145-5. Available from: https://jurnal.fti.umi.ac.id/index.php/JG/article/view/1523