Questionnaire on Marine Safety and Vessel Traffic Services in Philippine Coastal Waters (Part 2)
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해양환경안전학회지 Vol.19 No.3 (2013.06) pp.248-256
Questionnaire on Marine Safety and Vessel Traffic Services in Philippine Coastal Waters (Part 1)
올란도 디마일릭, 정재용, 김철승
해양환경안전학회지 Vol.19 No.2 (2013.04) pp.171-178