Analisis Ekonomis Sewa atau Beli Alat Excavator pada Kegiatan Produksi Bijih Timah PT Prima Timah Utama, Desa Cit, Kabupaten Bangka: Economic Analysis of Rent or Buy Excavator for Tin Production at PT Prima Timah Utama, Cit Village, Bangka Regency. mineral [Internet]. 2021 Oct. 1 [cited 2026 Apr. 19];6(2):13-7. Available from: https://www.journal.ubb.ac.id/index.php/mineral/article/view/3088