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A study of mine roof of the Pittsburgh coal bed in the Pittsburgh mining district

A study of mine roof of the coking district of Western Pennsylvania

Methods of development and pillar extraction in mining the Pittsburgh coal bed in Pennsylvania, West Virginia, and Ohio

Published Year

• 1930-1939 (3)

Subject

• Coal mines and mining--Pennsylvania (3) *
• Coal mines and mining--Ohio (1)
• Coal mines and mining--West Virginia (1)
• Coke--Pennsylvania (1)
• Industrial accidents--Pennsylvania (1)
• Mine safety--Pennsylvania (1)
• Mine timbering (1)
• Mining engineering (1)

Author

• Paul, J. W. (3) *
• Plein, Leopold Nicholas, (3)

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