“POTENTIAL OF RARE EARTH ELEMENTS (REE) IN KETAPANG DISTRICT IUP PT. PANGSUMA NATURAL STONE”. JUMPE : Journal of Mining, Mineral Processing, and Energy 1, no. 01 (December 12, 2023): 1–8. Accessed September 26, 2026. https://jumpe.jurnal.politap.ac.id/index.php/jumpe/article/view/1477.