| Author: | Paul, James Washington |
|---|---|
| Year: | 1929 |
| Document Type: | N/A |
| SUDOC: | C 22.11:6110 |
| Series: | Information circular (United States. Bureau of Mines) |
| Report Number: | Circular No. 6110 |
| Subjects: | Coal mine accidents. |
| Coal mines and mining. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc67001/ |