| U.S. Bureau of Mines Publications, Alaska | |
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U.S. Bureau of Mines Information Circular 8656 |
| Title: | Comparative Porphyry Copper Mining and Processing Costs - Alaska and Arizona | |
| Author: | Robert G. Bottge | |
| Year: | 1974 | |
| Pages: | 55 pp. | |
| Availability: | Contact librarian for availability |
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