PATIUNG, Obed; MENASYE THEO AFASEDANYA, Mapuay. Investment Feasibility Of A Sand And Gravel Quarry Using The Benefit Cost Ratio Method A Case Study Of Pt. Arkatama Mining, Jayawijaya Regency, Indonesia. MULTITEK INDONESIA : JURNAL ILMIAH, [S. l.], v. 19, n. 2, p. 193–199, 2026. DOI: 10.24269/mtkind.v19i2.12726. Disponível em: http://journal.umpo.ac.id/index.php/multitek/article/view/12726. Acesso em: 29 may. 2026.