| Author: | Howes, G. A. |
|---|---|
| Additional Authors: | Jackson, C. F. |
| Year: | 1932 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
| SUDOC: | C 22.11:6674 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 6674 |
| Subjects: | Shaft sinking--Costs |
| Mining engineering | |
| Shaft sinking--Technique | |
| Mines and mineral resources--Canada--Ontario | |
| Link: | https://hdl.handle.net/2027/mdp.39015077565037 |