| Author: | Adams, William W. | 
|---|---|
| Year: | 1929 | 
| Document Type: | N/A | 
| Issuing Agency: | United States. Bureau of Mines. | 
| Series: | United States Bureau of Mines Reports | 
| Report Number: | Bulletin 314 | 
| Subject: | Quarries and quarrying -- Accidents -- United States -- Statistics -- Periodicals. | 
| Link: | http://digital.library.unt.edu/ark:/67531/metadc12486/ |