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) Peter Wasilewski and Günther Kletetschka,Lodestone: Natures only permanent magnet‐What it is and how it gets charged,Geophysical Research Letters,0094-8276,American Geophysical Union (AGU),1999-08,26,15,2275-2278,https://cir.nii.ac.jp/crid/1363670320363331072,https://doi.org/10.1029/1999gl900496