Fadhilah A, Ah Mirul. Pengaruh dan Korelasi Analisis Proksimat (MAD, VM, Ash dan FC) Terhadap Nilai Hardgrove Grindability Index (HGI) Batubara di PT. Bukit Asam, Tbk. jits [Internet]. 2023 Dec. 29 [cited 2026 Oct. 21];1(2):79-86. Available from: https://jurnal.akipba.ac.id/index.php/JITS/article/view/15