Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1889-1915 (2)--Original Data, 1911-1939. Data Exclude Ore Containing Five Percent Or More Manganese. Source: U.S. Bureau Of The Mines, Mineral Resources.
This NBER data series a01193b appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01193b
National Bureau of Economic Research, Iron Ore Production, Total for United States [A0193BUSA419NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A0193BUSA419NNBR, November 18, 2017.