著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Motoyuki Kido and Yukihito Osada and Hiromi Fujimoto,Temporal variation of sound speed in ocean: a comparison between GPS/acoustic and in situ measurements,"Earth, Planets and Space",1880-5981,Springer Science and Business Media LLC,2008-03,60,3,229-234,https://cir.nii.ac.jp/crid/1363951795703661440,https://doi.org/10.1186/bf03352785