Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Iida Y.,Line of Position,NAVIGATION,0450660X,Japan Institute of Navigation,1973,40,0,22-31,https://cir.nii.ac.jp/crid/1390282681027741696,https://doi.org/10.18949/jinnavib.40.0_22