Haafidhi, Aashim Wisnu (2020) Studi Kasus Maintanance Vertical Centrifugal Sulphuric Acid Pump P-1301 Departemen Pemeliharaan Pabrik 3 Sulfuric Acid (SAII) PT Petrokimia Gresik. Project Report. [s.n], [s.l.]. (Unpublished)