MUHAMMAD ZAKI FATLUT RAHMAN; MAIYUDI, R. Calculation of The Cost of Underground Mining Activities on Tunnel 9 PT. Allied Indo Coal Jaya. Georest, [S. l.], v. 1, n. 1, p. 13–16, 2022. DOI: 10.57265/georest.v1i1.4. Disponível em: https://geo-rest.org/index.php/geo/article/view/4. Acesso em: 16 sep. 2025.