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Studies of roof movement in coal mines.
| Author: | Maize, Earl R. |
|---|---|
| Additional Authors: | Greenwald, H. P. |
| Year: | 1939 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.23:3452 |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 3452 |
| Subjects: | Mine roof control |
| Coal mines and mining | |
| Link: | https://hdl.handle.net/2027/mdp.39015078492397 |
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