ANGGARA, Ferian; T.B.M. PETRUS, Himawan; PATRIA, Aulia Agus; BANGUN, Aya Shika. Preliminary Study of Rare Earth Element and Yttrium (REY) Content of Coal In Sangatta Coalfield, East Kalimantan, Indonesia. Indonesian Journal on Geoscience, [S. l.], v. 7, n. 3, p. 305–314, 2020. DOI: 10.17014/ijog.7.3.305-314. Disponível em: https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/418. Acesso em: 13 feb. 2025.