Purwandari, Vivi, Saharman Gea, and Basuki Wijosentono. “Analisa XRD Terhadap Perubahan Struktur Dan Kristalinitas Karbonisasi Batubara Sawahlunto – Sijunjung Sumatera Barat”. Talenta Conference Series: Science and Technology (ST) 2, no. 1 (January 30, 2019): 88-91. Accessed April 26, 2024. https://talentaconfseries.usu.ac.id/st/article/view/321.