Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1890-1916 (2)--Original Data, 1916-1943. Data Are For Class I, Ii, And Iii Railways. The Year Ends December 31. Source: Interstate Commerce Commission, "Statistics Of Railways In The United States For 1943, " P. 150, Published 1945
This NBER data series a03003cb appears on the NBER website in Chapter 3 at http://www.nber.org/databases/macrohistory/contents/chapter03.html.
NBER Indicator: a03003cb
National Bureau of Economic Research, Railroad Revenue Freight Ton-Miles for United States [A033CBUSA253NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A033CBUSA253NNBR, September 29, 2016.