Patiung O, Menasye Theo Afasedanya M. 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 [Internet]. 2026 Jan. 2 [cited 2026 May 29];19(2):193-9. Available from: http://journal.umpo.ac.id/index.php/multitek/article/view/12726