Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Honda K.,On the Thumb Rule for Altering Course,The Journal of the Nautical Society of Japan,04666607,Japan Institute of Navigation,1957,17,0,75-83,https://cir.nii.ac.jp/crid/1390001206095297664,https://doi.org/10.9749/jina.17.0_75