Purba RE, Adam A, Batubara BM. IMPLEMENTATION OF THE PENTAHELIX SYNERGY MOVEMENT PROGRAM FOR THE OPTIMIZATION OF DISASTER MANAGEMENT IN NORTH SUMATRA PROVINCE (A CASE STUDY IN ASAHAN REGENCY). IIJSE [Internet]. 6Jun.2026 [cited 6Jun.2026];9(2):13147-53. Available from: https://e-journal.uac.ac.id/index.php/iijse/article/view/10606