著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Lehtinen, Martti","Lake Lappajärvi, a meteorite impact site in western Finland",,Geologinen tutkimuslaitos,1976,"Geological Survey of Finland, Bulletin",,9516900410,,https://cir.nii.ac.jp/crid/1130282272481643904