Railroad transportation :
a statistical record, 1911-1949 / Association of American Railorads, Bureau of Railway Economics.
APA Citation
Association of American Railroads. Bureau of Railway Economics. (1950). Railroad transportation: a statistical record, 1911-1949 / Association of American Railorads, Bureau of Railway Economics. Washington, D.C.: Association of American Railroads, Bureau of Railway Economics.
MLA Citation
Association of American Railroads. Bureau of Railway Economics. Railroad Transportation: a Statistical Record, 1911-1949 / Association of American Railorads, Bureau of Railway Economics. Washington, D.C.: Association of American Railroads, Bureau of Railway Economics, 1950.
Warning: These citations may not always be complete (especially for serials).