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By S. J. Davenport and G. G. Morgis
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With Appended List of Available Flame-lamp Fuels and Manufacturers of Flame-resistant Trailing Cables
Methods of controlling the chemical and physical qualities of underground air
Prevention of dust diseases (sections 1 and 2)
Need for air conditioning indicated by physical quality of underground air
July 1946
Idaho, Shoshone County, Coeur D'Alene District : the Silver Belt and the Sunshine Mine of the Coeur Dรlene District