Release: NBER Macrohistory Database
Series Is Presented Here As Three Variables--(1)--Original Data, 1870-1926 (2)--Original Data, 1925-1950 (3)--Original Data, 1941-1961. Source: Railway Age, "Annual Statistical And Outlook" Issues
This NBER data series q06026b appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: q06026b
National Bureau of Economic Research, Locomotives Ordered by American Railroads for Domestic Use for United States [Q0626BUSQ481NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/Q0626BUSQ481NNBR, October 26, 2016.