USBM IC 8656
Title:Comparative porphyry copper mining and processing costs - Alaska and Arizona
Publisher:U.S. Bureau of Mines
Ordering Info:This publication is out of print. Reproductions may be available. Download below or please see our publication sales page for more information.
Bottge, R.G., 1974, Comparative porphyry copper mining and processing costs - Alaska and Arizona: U.S. Bureau of Mines Information Circular 8656, 55 p.
- ic8656.pdf (2.6 M)