| Author: | Harrington, D. | 
|---|---|
| Year: | 1939 | 
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.27:7089 | 
| Series: | Information circular / Bureau of Mines ; | 
| Report Number: | 7089 | 
| Subjects: | Coal mines and mining--Safety measures | 
| Mine dusts | |
| Mine safety | |
| Dust control | |
| Link: | https://hdl.handle.net/2027/mdp.39015078534677 |