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Rock Bursts in the Lake Superior Copper Mines, Keweenaw Point, Michigan
| Author: | Crane, W. R. |
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| Year: | 1929 |
| Document Type: | N/A |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 309 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc12481/ |
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