Rachel Sabila Sudrajat, Syahrudin, Murad. ANALISIS KELAYAKAN INVESTASI PENAMBANGAN ANDESIT MENGGUNAKAN DISCOUNTED CASHFLOW DI PT. SULENCO WIBAWA PERKASA KECAMATAN SUNGAI PINYUH KABUPATEN MEMPAWAH. JSER [Internet]. 2024Feb.26 [cited 2026May30];5(2):1993–2006. Available from: https://idm.or.id/JSER/index.php/JSER/article/view/296