Series Is Presented Here As Four Variables--(1)--Seasonally Adjusted Data, 1919-1924 (2)--Seasonally Data, 1923-1953 (3)--Original Data, 1947-1956. Source: Computed By NBER From Federal Reserve Indexes Of Industrial Production For Iron And Steel, And For Nonferrous Metals And Products, Weighted According To Census Of Manufactures Total Value Added And F.R.B. Weights For 1947.
This NBER data series m01203a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01203a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Production of Metal Products for United States [M0103AUSM331SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0103AUSM331SNBR/, August 30, 2015.