FACHREZI, M. G. Feasibility Study for Investment Decision in Silica Sand Mining Through Comparative Analysis of New Machine Purchase, Machine Refurbishment, and Joint Operation. Jurnal sosial dan sains, [S. l.], v. 5, n. 12, p. 1002–1015, 2025. DOI: 10.59188/jurnalsosains.v5i12.32606. Disponível em: https://sosains.greenvest.co.id/index.php/sosains/article/view/32606. Acesso em: 31 jan. 2026.