| Author: | Manning, R. I. C. |
|---|---|
| Additional Authors: | Soule, Thomas. |
| Year: | 1930 |
| Document Type: | MAIN |
| SUDOC: | C 22.11:6351 |
| Series: | Information circular / United States Department of Commerce, Bureau of Mines ; |
| Report Number: | 6351 |
| Subject: | Mine safety--Arizona |
| Link: | https://hdl.handle.net/2027/mdp.39015095078971 |