Ngadenin, Adhika Junara Karunianto, and Frederikus Dian Indrastomo. “Penentuan Daerah Prospek Logam Tanah Jarang Di Pulau Singkep”. EKSPLORIUM 41, no. 1 (May 30, 2020): 15–24. Accessed December 6, 2025. https://ejournal.brin.go.id/eksplorium/article/view/8035.