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Sugiarto W, R. A. TL, Hartono HG, Budiadi E. The THE EFFECT OF GEOLOGICAL STRUCTURES ON THE COAL QUALITY OF THE SEMBAKUNG FORMATION IN BERAU REGENCY, EAST KALIMANTAN. Journal Technology of Civil, Electrical, Mechanical, Geology, Mining, and Urban Design [Internet]. 2024Apr.16 [cited 2024Jun.19];9(1):17-4. Available from: //journal.itny.ac.id/index.php/krvtk/article/view/4894