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) Roland G. Fryer and Steven D. Levitt,Understanding the Black-White Test Score Gap in the First Two Years of School,Review of Economics and Statistics,0034-6535,MIT Press - Journals,2004-05,86,2,447-464,https://cir.nii.ac.jp/crid/1363107370802540160,https://doi.org/10.1162/003465304323031049