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

Keyword Search

Directionally controlled drilling to horizontally intercept selected strata, upper Freeport coalbed, Green County, Pa.

Drainage of methane from the overlying Pocahontas no. 4 coalbed from workings in the Pocahontas no. 3 coalbed

Published Year

• 1970-1979 (2) *

Subject

• Coal mines and mining (2) *
• Mine ventilation (2) *
• Boring (1)
• Methane (1)
• Mine gases (1)

Author

• Cervik, Joseph, (1)
• Diamond, W. P. (1)
• Fields, H. H. (1)
• Finfinger, Gerald L. (1)
• Oyler, David C., (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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