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Roof support in coal mines in the Irwin, Greensburg and Latrobe Basins, Westmoreland County, Pa.

Published Year

• 1930-1939 (1)

Subject

• Coal mines and mining--Pennsylvania--Westmoreland County (1)
• Mine timbering (1) *

Author

• Craighead, S. J. (1)
• Paul, J. W. (1)
• Tomlinson, H. (1) *

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