POTENSI LOGAM TANAH JARANG (LTJ) DI KABUPATEN KETAPANG IUP PT. BATU ALAM PANGSUMA. JUMPE [Internet]. 2023 Dec. 12 [cited 2025 Dec. 8];1(01):1-8. Available from: https://jurnal.politap.ac.id/index.php/jumpe/article/view/1477