“Studi Potensi Logam Tanah Jarang Dari Coal Combustion Product Sisa Pembakaran PLTU Mulut Tambang”. Jurnal Geomine 8, no. 03 (December 31, 2020): 237–246. Accessed April 7, 2026. https://jurnal.fti.umi.ac.id/index.php/JG/article/view/1411.