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Ventilation of manholes.

Ventilation of manholes.

Published Year

• 1930-1939 (1)
• 1940-1949 (1)

Subject

• Air (2) *
• Manholes (2)
• Manholes--Design and construction (1)
• Manholes--Maintenance and repair (1)
• Ventilation (1)

Author

• Campbell, John, (2) *
• Jones, G. W. (2)
• Baker, E. S. (1)
• Miller, W. E. (1)

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