Irzon, Ronaldo, Agus Didit Haryanto, and Miharja Kurnia. “A Rare Earth Oxides-Containing Internal Reference Material of Purified Monazite from Bangka Island”. Majalah Ilmiah Pengkajian Industri; Journal of Industrial Research and Innovation 16, no. 2 (September 13, 2023): 46–52. Accessed December 13, 2025. https://ejournal.brin.go.id/MIPI/article/view/1343.