Studi Pengendalian Level pada Vessel Ammonia Heater (64-EA-2001) di PT Pupuk Iskandar Muda. litek [Internet]. 2024 Sep. 1 [cited 2025 Apr. 27];21(2):115-21. Available from: https://ejournal.pnl.ac.id/index.php/litek/article/view/46