The Potential of Brantas River Iron Sand as A Source of Silica and Calsite Materials. Jurnal Teknik Mesin, [S. l.], v. 8, n. 2, p. 61–66, 2018. DOI: 10.21063/jtm.2018.v8.i2.61-66. Disponível em: https://jtm.itp.ac.id/index.php/jtm/article/view/546. Acesso em: 21 agu. 2025.