| Author: | Look, Allen D. |
|---|---|
| Additional Authors: | Sharp, Alan A. |
| Year: | 1949 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7501 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 7501 |
| Subjects: | Mine safety--Arizona |
| Copper mines and mining--Arizona--Safety measures | |
| Mineral industries--Safety measures | |
| Link: | https://hdl.handle.net/2027/mdp.39015078534750 |