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Method and cost of mining the Upper and Lower Freeports and the Lower Kittanning coal in a group of mines in Western Central Pennsylvania

Method and cost of mining the Pittsburgh, or no. 8, coal bed in four eastern Ohio mines

Published Year

• 1920-1929 (2) *

Subject

• Coal mines and mining--Ohio (1)
• Coal mines and mining--Pennsylvania--Armstrong County (1)
• Coal mines and mining--Pennsylvania--Westmoreland County (1)

Author

• Paul, J. W. (2)
• Tomlinson, H. (2) *

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