1.
PERHITUNGAN CADANGAN BATUBARA DENGAN METODE CIRCULAR USGS 1983 DI PT. PACIFIC PRIMA COAL SITE LAMIN KAB. BERAU PROVINSI KALIMATAN TIMUR. Geomine [Internet]. 2015 Apr. 30 [cited 2025 Jun. 27];1(01):1-5. Available from: https://jurnal.fti.umi.ac.id/index.php/JG/article/view/1292