POTENTIAL OF RARE EARTH ELEMENTS (REE) IN KETAPANG DISTRICT IUP PT. PANGSUMA NATURAL STONE. JUMPE [Internet]. 2023 Dec. 12 [cited 2026 Sep. 25];1(01):1-8. Available from: https://jumpe.jurnal.politap.ac.id/index.php/jumpe/article/view/1477