Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) YOSHIMURA Yoshio and KITAZAWA Masanaga,Routeing System on the Outside of Harbour Limit and Fishery Problems,NAVIGATION,0450660X,Japan Institute of Navigation,1974,43,0,1-6,https://cir.nii.ac.jp/crid/1390001206052009856,https://doi.org/10.18949/jinnavib.43.0_1