Author: | Stahl, R. Ward. |
---|---|
Year: | 1962 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:8113 |
Series: | Information circular / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 8113 |
Subjects: | Mine roof bolting--Testing |
Mine roof control | |
Coal mines and mining--Safety measures | |
Link: | https://hdl.handle.net/2027/mdp.39015077564261 |