SY, Suci Rahmawati. Analisis Perhitungan Biaya Penambangan Batu Silika Pada Departemen Tambang PT Semen Padang. Jurnal Optimasi Sistem Industri, [S. l.], v. 10, n. 1, p. 93–104, 2011. DOI: 10.25077/josi.v10.n1.p93-104.2011. Disponível em: https://josi.ft.unand.ac.id/index.php/josi/article/view/360. Acesso em: 15 mar. 2025.