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Description
Produced by the US Bureau of Mines in 1959. Duration: 8:19
Produced by the US Bureau of Mines in 1959. Duration 6:03.
Produced by the US Bureau of Mines in 1959. Duration 5:40.
Duration 0:27
This is clipped from The Air We Breathe in Industrial Environments, a 16 minute US Bureau of Mines film from 1972. Duration 2:20.