| Year: | 1960 |
|---|---|
| Document Type: | N/A |
| Issuing Agency: | United States. Bureau of Mines. |
| SUDOC: | I 28.6:51/960 |
| Series: | Miners' circular (United States. Bureau of Mines) |
| Subjects: | Mine safety -- United States. |
| Mine accidents -- United States -- Statistics. | |
| Mine accidents -- United States -- Prevention. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc40318/ |