Sitorus MH, Suryanta A, Adi S. THE ROLE OF MENTAL DEVELOPMENT OF INDONESIAN NAVY’S FIRST FLEET TO INCREASE THE OPERATION READINESS OF THE NAVY OFFICER. Han. Belneg [Internet]. 2019 Dec. 13 [cited 2026 Aug. 5];9(3):89-101. Available from: http://jurnal.idu.ac.id/index.php/JPBH/article/view/646