PERENCANAAN PENAMBANGAN TRIWULAN PERTAMA MENGGUNAKAN DATA TOPOGRAFI BASED ON SURVEY DI PT ALLIED INDO COAL JAYA SAWAHLUNTO, SUMATERA BARAT. PROCEEDINGS OF NATIONAL COLLOQUIUM RESEARCH AND COMMUNITY SERVICE, [S. l.], v. 4, 2021. DOI: 10.33019/snppm.v4i0.2162. Disponível em: https://www.journal.ubb.ac.id/index.php/snppm/article/view/2162. Acesso em: 23 may. 2026.