Thezha El Hutapea, Suparman Suparman, Meriah Kita Deliani N. Procedure for Extending Safety Certificates for Coal Carrier Vessels at The Harbor Master’s Office and Class 1 Port Authority in PT. Pacific Samudra Sentosa Bandar Lampung. Maeswara [Internet]. 2024 Dec. 11 [cited 2024 Dec. 23];2(6):20-3. Available from: https://journal.arimbi.or.id/index.php/Maeswara/article/view/1428