Author: | Howes, Merwin H. |
---|---|
Year: | 1966 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:8294 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 8294 |
Subjects: | Mine safety |
Underground construction | |
Mining engineering--Safety measures | |
Link: | https://hdl.handle.net/2027/mdp.39015077578097 |