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 National Center for Health Statistics (U.S.),Natality,,"U. S. Depertment of Health and Human Services, Public Health Service",1989,DHHS publication,,,,https://cir.nii.ac.jp/crid/1130282269949864064