著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Kachi Yuko and Kato Tsuguhiko and Kawachi Ichiro,Socio-Economic Disparities in Early Childhood Education Enrollment: Japanese Population-Based Study,Journal of Epidemiology,0917-5040,日本疫学会,2020-03-05,30,3,143-150,https://cir.nii.ac.jp/crid/1390846609809781120,https://doi.org/10.2188/jea.je20180216