Author: | Beus, Michael J. |
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Additional Authors: | Phillips, Earl L., |
Year: | 1974 |
Document Type: | BMRA |
Issuing Agency: | U.S. Bureau of Mines, |
SUDOC: | I 28.23:7972 |
Series: | Report of investigations / United States. Bureau of Mines ; |
Report Number: | 7972 |
Subjects: | Mine timbering--Measurement |
Mine roof bolting--Measurement | |
Link: | https://hdl.handle.net/2027/mdp.39015078484394 |