著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Ishihara,The relationship between micro-earthquake swarms and volcanic activity at Sakurajima Volcano,"Annuals of Disaster Prevention Research Institute, Kyoto University",,,1989,32B-1,,1,https://cir.nii.ac.jp/crid/1370005999376922116,