Author: | Kingery, D. S. |
---|---|
Year: | 1952 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | i 28.27:7638 |
Series: | Information circular / United States. Bureau of Mines ; |
Report Number: | 7638 |
Subjects: | Coal mines and mining--Safety measures |
Shuttle cars (Mine haulage)--Safety measures | |
Link: | https://hdl.handle.net/2027/mdp.39015078455865 |