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Drilling and blasting, open-cut iron-ore mines, Lake Superior District
| Author: | Johnson, John A. |
|---|---|
| Additional Authors: | Anderson, Floyd G., Stott, Roy G. |
| Year: | 1950 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7552 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 7552. |
| Subjects: | Iron mines and mining--Michigan |
| Strip mining | |
| Iron mines and mining--Minnesota | |
| Iron mines and mining--Wisconsin | |
| Link: | https://hdl.handle.net/2027/mdp.39015078464206 |
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