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Effectiveness of Bleeder Entries in Ventilating Pillared Areas of Bituminous-Coal Mines
| Author: | Kingery, Donald S. |
|---|---|
| Year: | 1957 |
| Document Type: | N/A |
| SUDOC: | I 28.23:5360 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | R. I. 5360 |
| Subjects: | Mine ventilation. |
| Bituminous coal mines and mining. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc38664/ |
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