Sugiarto, W., R. A., T. L., Hartono, H. G. and Budiadi, E. (2024) “The THE EFFECT OF GEOLOGICAL STRUCTURES ON THE COAL QUALITY OF THE SEMBAKUNG FORMATION IN BERAU REGENCY, EAST KALIMANTAN”, KURVATEK, 9(1), pp. 17-24. doi: 10.33579/krvtk.v9i1.4894.