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Anas, Khoirun (2021) Analisa Beban Kerja Guna Menentukan Jumlah Tenaga Kerja yang Optimal di UD. Uma Jaya Ngingas Waru Sidoarjo. (Workload Analysis in Order to Determine the Optimal Number of Workers at UD. Uma Jaya Ngingas Waru Sidoarjo). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.