Search U.S. government technical reports digitized or harvested by TRAIL.

Keyword Search

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

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

Published Year

• 1920-1929 (1)
• 1930-1939 (1)

Subject

• Coal mines and mining--Ohio (2) *
• Coal mines and mining--Pennsylvania (1)
• Coal mines and mining--West Virginia (1)
• Mining engineering (1)

Author

• Paul, J. W. (2)
• Plein, Leopold Nicholas, (1)
• Tomlinson, H. (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

Search developed and maintained by the University of Washington Libraries
Copyright 2010