Author
Association of American Railroads. Bureau of Railway Economics
3
Association of American Railroads. Car Service Division
4
Association of American Railroads. Economics and Finance Department
1
Association of American Railroads. Economics and Finance Dept
1
Association of American Railroads. Railroad Committee for the Study of Transportation
3
Association of American Railroads. Transportation Division
1
Bureau of Railway Economics (Washington, D.C.)
3
Bureau of Railway News and Statistics
1