Unair, I., F.(2020).The Indonesia Journal Of Occupational Safety and Health Vol. 9 No.3 2020 (Vol. 9 No.3 2020 September).Surabaya:FKM Unair.
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Unair, I., F..The Indonesia Journal Of Occupational Safety and Health Vol. 9 No.3 2020.Vol. 9 No.3 2020 SeptemberSurabaya:FKM Unair,2020.Jurnal Nasional.