ANALISIS HARDGROVE GRIDABILITY INDEX BATUBARA TERHADAP PRODUKTIVITAS ALAT GALI MUAT DI PT KTCNBL KALIMANTAN TENGAH. PROCEEDINGS OF NATIONAL COLLOQUIUM RESEARCH AND COMMUNITY SERVICE, [S. l.], v. 6, p. 11–15, 2022. DOI: 10.33019/snppm.v6i0.3681. Disponível em: https://www.journal.ubb.ac.id/index.php/snppm/article/view/3681. Acesso em: 13 apr. 2026.