| Author: | Murray, Arthur L. |
|---|---|
| Year: | 1921 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:2265 |
| Series: | Report of investigations / United States. Bureau of Mines ; |
| Report Number: | 2265 |
| Subjects: | Mines and mineral resources--Safety measures |
| Oil-shales | |
| Mine safety | |
| Link: | https://hdl.handle.net/2027/mdp.39015086555458 |