Series Is Presented Here As Two Variables--(1)--Original Data, 1911-1946 (2)--Original Data, 1943-1955. Data Include The Byproduct Of Ore Obtained From Treating Pyrites. Such Byproduct Materials Were Not Included In Other Variables In This Series With Only Annual Data. Source: U.S. Department Of Commerce, Survey Of Current Business, Statistical Supplements, 1947-1955
This NBER data series m05086 appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05086
Release: NBER Macrohistory Database
National Bureau of Economic Research, Iron Ore Stocks at Mines for Lake Superior Region [M0508641M418NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0508641M418NNBR, May 28, 2016.