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The value of oxygen breathing apparatus to the mining industry

Published Year

• 1920-1929 (1)

Subject

• Breathing apparatus (1)
• Mine rescue work--Equipment and supplies (1) *
• Mine safety (1)
• Respirators (Medical equipment) (1)

Author

• Bernewitz, Max Wilhelm von, (1) *
• Denny, E. H. (1)

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