Abbas, Said Hi, and Firman Firman. 2020. “ANALISIS POTENSI LOGAM TANAH JARANG ABU BATUBARA LIMBAH PLTU MULUT TAMBANG PT. WANATIARA PERSADA KAWASI OBI”. Journal Of Science and Engineering 3 (2). https://doi.org/10.33387/josae.v3i2.2424.