ESTIMASI GEOLOGICAL STRENGTH INDEX (GSI) SYSTEM PADA LAPISAN BATUGAMPING BERONGGA DI TAMBANG KUARI BLOK SAWIR TUBAN JAWA TIMUR. PROMINE, [S. l.], v. 2, n. 2, 2018. DOI: 10.33019/promine.v2i2.76. Disponível em: https://journal.ubb.ac.id/index.php/promine/article/view/76. Acesso em: 12 apr. 2026.