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 Kanji Text Research Group University of Tokyo,250 essential kanji for everyday use,,Tuttle,1993,Tuttle language library,,"0804835586,0804836388",,https://cir.nii.ac.jp/crid/1130000796004124928