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) Jean-pierre Valet and Laure Meynadier,Geomagnetic field intensity and reversals during the past four million years,Nature,0028-0836,Springer Science and Business Media LLC,1993-11,366,6452,234-238,https://cir.nii.ac.jp/crid/1363670319725918720,https://doi.org/10.1038/366234a0