Sarmidi Sarmidi, Yulius Mases, Age Palogan Kesuma. Analisis Efisiensi Jam Kerja Excavator CAT 345 GC di Area Penambangan Pit E Banko Barat PT. Rifansi Dwi Putra. jits [Internet]. 2023 Aug. 29 [cited 2026 Oct. 21];1(1):11-8. Available from: https://jurnal.akipba.ac.id/index.php/JITS/article/view/3