| Author: | Machisak, John C. |
|---|---|
| Additional Authors: | Glidden, Zelda S., Kearney, Naomi W. |
| Year: | 1960 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7975 |
| Series: | Information circular - Bureau of Mines ; |
| Report Number: | 7975 |
| Subject: | Quarries and quarrying--Accidents--Statistics |
| Link: | https://hdl.handle.net/2027/mdp.39015078461046 |