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
United States. Children's Bureau and U.S. Council of National Defense. Field Division. Child Conservation Section,The employment-certificate system : a safeguard for the working child,,Government Printing Office,1919,Bureau publication,,,,https://cir.nii.ac.jp/crid/1130282270163660800