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. Missing Data Were Not Reported. Source: Data For 1919-1925: The Record Book Of Business Statistics, Part 2, P. 49; Data For 1926-1938: American Bureau Of Metal Statistics Yearbook
This NBER data series m05020b appears on the NBER website in Chapter 5 at http://www.nber.org/databases/macrohistory/contents/chapter05.html.
NBER Indicator: m05020b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Refined Copper Stocks for United States, Canada, Chile [M05F0B46M601NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M05F0B46M601NNBR, February 8, 2016.