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

Keyword Search

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

Falls of roof and coal in mines operating in the Pittsburgh Coal Bed, Panhandle District, West Virginia

Falls of roof in mines operating in the Pittsburgh Coal Bed, West Virginia

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

Published Year

• 1930-1939 (4)

Subject

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

Author

• Paul, J. W. (4) *
• Geyer, John Nicholas, (2) *
• Calverley, Joseph Gladstone, (1)
• Plein, Leopold Nicholas, (1)
• Sibray, Donald Loammi, (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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