http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Railroads. Operating revenues and operating expenses of class 1 steam railways in United States, compiled from 149 monthly reports of revenues and expenses representing 150 class 1 steam railways, Dec. 1933 and 1932 [and 12 months ended with Dec. 1933 and 1932; prepared in] Bureau of Statistics
1 online resource (2 unnumbered pages), digital, PDF file
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2016 digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.