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| Observations of K3, Standard Operational Procedures (SOP), Frequency rate, Saverity rate and Safe-T-score. (2) |
| Pengamatan terhadap K3, Standar Oprasional Prosedur (SOP), Frequensi rate, Saverity rate dan Safe-T-score (2) |
| Proceedings of Mining Engineering (2) |
| Teknik Pertambangan (2) |
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