| Author: | Repsher, Richard C. |
|---|---|
| Additional Authors: | Black, D. Jan. |
| Year: | 1979 |
| Document Type: | MAIN |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:8399 |
| Series: | Report of investigations ; |
| Report Number: | 8399 |
| Subjects: | Coal mines and mining--Safety measures |
| Rock noise--Measurement | |
| Link: | https://hdl.handle.net/2027/mdp.39015095269810 |