Novianti, Rina, 		Sitorus, Saibun, AND 		Hiyahara, Irfan.
" ANALISIS NILAI TOTAL SULFUR (TS) DAN CALORIFIC VALUE (CV) DALAM BATUBARA MENGGUNAKAN METODE AMRERICAN STANDARD TESTING AND MATERIAL (ASTM) DI PT GEOSERVICES SAMARINDA KALIMANTAN TIMUR" <em>PROSIDING SEMINAR NASIONAL KIMIA</em> [Online], Volume 3 Number 1 (5 November 2024)