Analisa XRD Terhadap Perubahan Struktur Dan Kristalinitas Karbonisasi Batubara Sawahlunto – Sijunjung Sumatera Barat: XRD Analysis of Changes in the Structure and Crystallinity of Sawahlunto - Sijunjung West Sumatra Coal Carbonization. (2019). Talenta Conference Series: Science and Technology (ST), 2(1), 88-91. https://doi.org/10.32734/st.v2i1.321