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The quick determination of incombustible matter in coal and rock-dust mixtures in mines

Published Year

• 1910-1919 (1)

Subject

• Coal mines and mining--Safety measures (1)
• Mine explosions (1) *

Author

• Fieldner, Arno Carl, (1) *
• Osgood, F. D. (1)
• Selvig, Walter A., (1)

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