| Author: | Roalfe, George Adams. |
|---|---|
| Year: | 1932 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6609 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6609 |
| Subjects: | Quarries and quarrying--California--Cost of operation |
| Quarries and quarrying--California | |
| Link: | https://hdl.handle.net/2027/mdp.39015086485409 |