| Author: | Adams, William W. |
|---|---|
| Year: | 1940 |
| Document Type: | N/A |
| Issuing Agency: | United States. Bureau of Mines. |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 432 |
| Subject: | Quarries and quarrying -- Accidents -- United States -- Statistics -- Periodicals. |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc12592/ |