Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1913-1941 (2)--Original Data, 1941-1964. Data Refer To Orders From Both Outside Builders And From Owned Shops. The Figures For December, 1913 And December, 1918 Are Estimated. (N.B. Where Some Monthly Figures Are Obviously Misprinted Or Erroneously Revised The Correct Item Has Been Determined With The Annual Sum). Source: Iron Trade Review, For Data Through July, 1930; Thereafter, "Steel" Until 1941.
National Bureau of Economic Research, New Orders of Freight Cars for United States [M067AAUSM471NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M067AAUSM471NNBR, June 28, 2017.