Source: National Bureau of Economic Research  

Release: NBER Macrohistory Database  

Units:  Thousands of Short Tons, Not Seasonally Adjusted

Frequency:  Monthly

Data Originally Given In Long Tons Were Converted To Short Tons By NBER. Source: U.S. Geological Survey, Mineral Resources (Checked With D. Houston And Company, Copper Manual, 1904, Vol. Iii, Pp. 82-85).

This NBER data series m01138 appears on the NBER website in Chapter 1 at http://www.nber.org/databases/macrohistory/contents/chapter01.html.

NBER Indicator: m01138