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2022. ANALISIS HARDGROVE GRIDABILITY INDEX BATUBARA TERHADAP PRODUKTIVITAS ALAT GALI MUAT DI PT KTCNBL KALIMANTAN TENGAH. PROCEEDINGS OF NATIONAL COLLOQUIUM RESEARCH AND COMMUNITY SERVICE. 6, (Dec. 2022), 11–15. DOI:https://doi.org/10.33019/snppm.v6i0.3681.