| Author: | Freedman, Robert W. |
|---|---|
| Year: | 1971 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:8521 |
| Series: | Information circular / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 8521 |
| Subjects: | Silica |
| Mine dusts--Analysis | |
| Silicosis | |
| Link: | https://hdl.handle.net/2027/mdp.39015078514752 |