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. Bureau of Labor Statistics,Indexes of output per man-hour : concrete products industry,,"U.S. Dept. of Labor, Bureau of Labor Statistics",1965,BLS report,,,,https://cir.nii.ac.jp/crid/1130000795588185600