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Design of drill-hole grid spacings for evaluating low-grade copper deposits
| Author: | Hewlett, Richard F. |
|---|---|
| Year: | 1965 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:6634 |
| Series: | Report of investigations / Bureau of Mines ; |
| Report Number: | 6634 |
| Subjects: | Boring |
| Copper ores | |
| Copper mines and mining | |
| Link: | https://hdl.handle.net/2027/mdp.39015078468132 |
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