Release: NBER Macrohistory Database
Series Is Presented Here As Three Variables--(1)--Original Data, 1889-1915 (2)--Original Data, 1911-1937 (3)--Original Data, 1930-1939. Data Include Iron Ridge Area (Southern Wisconsin); Also Both Railroad And Waterborne Shipments Are Included. Source: Lake Superior Iron Ore Association, Lake Superior Iron Ores, 1938, Pp. 308, 340.
This NBER data series a01194a appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.
NBER Indicator: a01194a
National Bureau of Economic Research, Iron Ore Shipments, Lake Superior Region, Total for United States [A0194AUSA418NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A0194AUSA418NNBR, November 24, 2017.