Harahap UN, Syarif AA, Hasibuan YM, Pasaribu JP, Hutabarat DEC. USULAN PERBAIKAN SISTEM MANAJEMEN KESELAMATAN KERJA MENGGUNAKAN METODE HAZARD IDENTIFICATION AND RISK ASSESMENT CONTROL (HIRAC) DI PT PERKEBUNAN NUSANTARA IV. Jurnal Simetri Rekayasa [Internet]. 2022 Apr. 30 [cited 2025 Aug. 22];4(1):249-57. Available from: https://jurnal.harapan.ac.id/index.php/JSR/article/view/663