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dengan Unsafe Action di Apartemenen Rolling Mill. The Indonesian Journal of Occupational Safety and Health Vol. 7(3): 300-309. Kurniawan, Y. 2015. Tingkat Pelaksanaan Sistem Manajemen Keselamatan dan Kesehatan Kerja (SMK3) pada Proyek Konstruksi, Studi Kasus di Kota Semarang. Jurnal Unnes Scaffolding. Vol. 4(1): 98-103. Kusumarini, D.A. 2017.

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