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 "Mayfarth, Frances and Association for Childhood Education International",Knowing when children are ready to learn,,"Association for Childhood Education, 1947",1947,Bulletin of the Association for Childhood Education,,,,https://cir.nii.ac.jp/crid/1130282272463425408