Author: | Howes, G. A. |
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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 |