1914-1940 Data Were Also Checked With Bls Series Of Two Digit Figures. 1926-1938 Data Were Also Checked With The U.S. Steel Corporation, Tnec Papers, Vol.Ii, P.82. Source: Iron Age, January Review Issues, 1915, 1920, 1940, And Following Monthly Issues.
This NBER data series m04159 appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: m04159
Release: NBER Macrohistory Database
National Bureau of Economic Research, Wholesale Price of Steel Tank Plates for Pittsburgh, PA [M04159US38300M267NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M04159US38300M267NNBR/, July 31, 2015.