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) Masahiko Takeda,Geomagnetic field variation and the equivalent current system generated by an ionospheric dynamo at the solstice,Journal of Atmospheric and Terrestrial Physics,0021-9169,Elsevier BV,1990-01,52,1,59-67,https://cir.nii.ac.jp/crid/1361137044349477632,https://doi.org/10.1016/0021-9169(90)90115-4