Comparative porhyry copper mining and processing costs - Alaska and Arizona/
by R.G. Bottge.-
- (Washington): U.S. Bureau of Mines, (1974)
- 55 p.: ill.-
- (U.S. Bureau of Mines. Information circular 8656). .
Includes bibliography.
--Copper mines and mining - Cost of operation.--Alaska - --Copper mines and mining - Cost of operation.--Arizona -