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Safety Factors in Construction and Ventilation, Wawona Vehicular Tunnel, Yosemite National Park, California

Some Essential Safety Factors in Tunneling

Published Year

• 1940-1949 (2) *

Subject

• Tunneling. (1)
• Tunnels -- Ventilation. (1)

Author

• Ash, S. H. (1)
• Harrington, D. (1)

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