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A flexible helical rock bolt
| Author: | Babcock, Clarence O. |
|---|---|
| Year: | 1978 |
| Document Type: | BMRA |
| Issuing Agency: | Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:8300 r |
| Series: | Report of investigations / Bureau of Mines ; |
| Report Number: | 8300r |
| Subject: | Rock bolts |
| Link: | https://hdl.handle.net/2027/mdp.39015078483503 |
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