I Nengah Putra, Deni DAR, Timbul Siahaan, Khaerudin Syahid, Beny Rudiawan, Challenges and Opportunities of the Implementation of Human Assistance and Disaster Relief (Ha/Dr) Operation by Indonesian Navy in Southeast Asian Region, International Journal of Management Sciences and Business Research 10(2019):154-161 DOI: 10.5281/zenodo.3614741