Release: NBER Macrohistory Database
Series Is Presented Here As Four Variables--(1)--Original Data, 1909-1914 (2)--Original Data, 1919-1938 (3)--Original, 1937-1946 (4)--Original, 1933-1957. Source: Data For 1909-May 1914: The Record Book Of Business Statistics, Part Ii, P. 47; Data For June-December 1914: American Copper Producers' Association, "American Metal Market"
This NBER data series m05020a appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05020a
National Bureau of Economic Research, Refined Copper Stocks, End of the Month for United States [M05F0AUSM601NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M05F0AUSM601NNBR, November 22, 2017.