“Evaluasi Produktifitas Crusher Pengolahan Batubara PT Nuansa Cipta Coal Investment”. Jurnal Geologi Pertambangan (JGP) 29, no. 2 (August 23, 2023): 40–52. Accessed August 24, 2025. https://ejurnal.unikarta.ac.id/index.php/jgp/article/view/1373.