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 a 100 percent mechanized mine in eastern Ohio

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

Timbering regulations in certain coal mines of Pennsylvania, West Virginia, and Ohio

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

Published Year

• 1920-1929 (2)
• 1930-1939 (2)

Subject

• Coal mines and mining--Ohio (4) *
• Coal mines and mining--Pennsylvania (2)
• Coal mines and mining--West Virginia (2)
• Mine timbering (1)
• Mining engineering (1)

Author

• Paul, J. W. (3)
• Calverley, Joseph Gladstone, (1)
• Christy, E. J. (1)
• Hazen, W. F. (1)
• Plein, Leopold Nicholas, (1)
• Sibray, Donald Loammi, (1)
• Tomlinson, H. (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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