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
U. S. Bureau of Labor Statistics.,Productivity trends in sellected industries : indexes through 1950,,U.S. Government Printing Office,1951,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000794012662400