Author: | Hedges, J. H. |
---|---|
Year: | 1940 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:7125 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 7125. |
Subjects: | Manganese mines and mining--Colorado--Leadville |
Manganese--Colorado--Leadville | |
Link: | https://hdl.handle.net/2027/mdp.39015078534065 |