Data Are Computed By NBER From Total Pig Iron Production Less Pig Iron Produced By Steel Mills. Source: Iron Age, Successive Monthly Issues
This NBER data series m01131b appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: m01131b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Merchant Pig Iron Production for United States [M0131BUSM561SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0131BUSM561SNBR/, July 4, 2015.