Data Are Averages Of Iron Age Quotations On Steel Bars, Shapes, Plates, Plain Wire, Open Hearth Rails (Bessemer Rails For 1902-1913), Black Pipe, And Black Sheets For Period Prior To 1920. Hot Rolled Strip Added For The Subsequent Period. Source: Iron Age, January 6, 1938, P.107 And January 4, 1940, P.171
This NBER data series m04155 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04155
Release: NBER Macrohistory Database
National Bureau of Economic Research, Composite Price of Furnished Steel Products for United States [M04155USM267NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04155USM267NNBR/, October 3, 2015.