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The Experimental mine of the United States Bureau of Mines

Published Year

• 1930-1939 (1)

Subject

• Coal mines and mining--Dust control--Pennsylvania--Pittsburgh (1)
• Mine dusts--Pennsylvania--Pittsburgh (1) *

Author

• Greenwald, H. P. (1)
• Howarth, H. C. (1) *
• Rice, George S. (1)

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