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 Association of American Railroads. Bureau of Railway Economics,"Effect of recent wage advances upon railway employees' compensation during the year ending June 30, 1911 ; Variations in the number of railway employees, 1909-1910-1911 ; Relation of the number of employees and thier compensation to traffic and revenue, 1909-1910-1911",,[Breau of Railway Economics],1912,Bulletins of the Bureau of Railway Economics,,,,https://cir.nii.ac.jp/crid/1130000797209749760