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Safety Factors in Construction and Ventilation, Wawona Vehicular Tunnel, Yosemite National Park, California
| Author: | Ash, S. H. |
|---|---|
| Year: | 1940 |
| Document Type: | N/A |
| SUDOC: | I 28.7:608 |
| Series: | Technical paper (United States. Bureau of Mines) |
| Report Number: | Technical Paper 608 |
| Subjects: | Tunnels -- Ventilation. |
| Tunneling. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc66427/ |
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