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 "湯川, 笑子",L1 Japanese attrition and regaining : three case studies of two early bilingual children,,"Centre for Research on Bilingualism, Stockholm Univercity",1997,Dissertations in Bilingualism,,9162826905,,https://cir.nii.ac.jp/crid/1130282269861495296