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. Interstate Commerce Commission. Bureau of Statistics,"Comparative statement of operating averages : Class I steam railways in the United States/ Interstate Commerce Commission, Bureau of Statistics",,U.S. G.P.O.,1931,Statement,,,,https://cir.nii.ac.jp/crid/1130000797325383040