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Mine safety and accident economy in Colorado metal mines
| Author: | Denny, E. H. |
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| Year: | 1930 |
| Document Type: | MAIN |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6275 |
| Series: | Information circular ; |
| Report Number: | 6275 |
| Subject: | Mine safety--Colorado |
| Link: | https://hdl.handle.net/2027/mdp.39015095083682 |
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