Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SAKAMOTO Yurin and HIRAIWA Takashi and YONETA Kunisaburo,"Statistical Studies on Omega Measurement at Hakodate IV : The annual peculiarity of the A-H, C-H and D-H pair",The Journal of Japan Institute of Navigation,03887405,Japan Institute of Navigation,1977,58,0,23-32,https://cir.nii.ac.jp/crid/1390001205480492800,https://doi.org/10.9749/jin.58.23