Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Thousands of Short Tons, Not Seasonally Adjusted

Frequency:  Monthly

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