Tanggara DNSP, Kristiana W. KARAKTERISTIK BATUBARA DAERAH KATANJUNG DAN SEKITARNYA : CHARACTERISTICS OF COAL IN THE KATANJUNG AREA. JTP [Internet]. 2023 Aug. 31 [cited 2024 Nov. 19];23(2):11-7. Available from: https://e-journal.upr.ac.id/index.php/JTP/article/view/10483