MAYNARDI, D. I. M.; PRATIWI, D. A.; TRIANDA, S. .; ISNAWAN, D. ESTIMATION OF COAL RESOURCES FOR SEAM S3 AND SEAM S4 USING THE DONUT POLYGON METHOD IN THE SERONGGA AREA, TANAH BUMBU REGENCY, SOUTH KALIMANTAN PROVINCE. KURVATEK, [S. l.], v. 10, n. 2, 2025. DOI: 10.33579/krvtk.v10i2.6405. Disponível em: https://journal.itny.ac.id/index.php/krvtk/article/view/6405. Acesso em: 5 jun. 2026.