| Author: | Turner, Scott. | 
|---|---|
| Year: | 1933 | 
| Document Type: | USBI | 
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, | 
| SUDOC: | C 22.11:6682 | 
| Series: | Information circular / United States Department of Commerce, Bureau of Mines ; | 
| Report Number: | 6682 | 
| Subjects: | Mines and mineral resources | 
| Mineral industries--Economic aspects | |
| Link: | https://hdl.handle.net/2027/mdp.39015086485854 |