“PERENCANAAN PENAMBANGAN TRIWULAN PERTAMA MENGGUNAKAN DATA TOPOGRAFI BASED ON SURVEY DI PT ALLIED INDO COAL JAYA SAWAHLUNTO, SUMATERA BARAT”. 2021. PROCEEDINGS OF NATIONAL COLLOQUIUM RESEARCH AND COMMUNITY SERVICE 4 (January). https://doi.org/10.33019/snppm.v4i0.2162.