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Methods and costs of constructing the underground facility of North American Air Defense Command at Cheyenne Mountain, El Paso County, Colo.
Research and technologic work at the Health and Safety Research and Testing Center :fiscal years 1960-65
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Published Year
1960-1969 (2)
Subject
Mine safety (2)
Mining engineering--Safety measures (2) *
Coal mines and mining--Safety measures (1)
Coal mines and mining--research (1)
Underground construction (1)
Author
Howes, Merwin H. (1)