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Putra, Dominikus Oktangada Kurnia and Saputro, Cahyo Dita (2020) ANALISIS PRODUKTIVITAS DAN BIAYA ALAT BERAT EXCAVATOR STUDI KASUS PERTAMBANGAN PASIR SUNGAI GENDOL EXCAVATOR EQUIPMENT PRODUCTIVITY AND COST ANALYSIS ON GENDOL RIVER SAND MINING CASE STUDY. Tugas Akhir thesis, University Technology Yogyakarta.