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

Keyword Search

Mechanical mining in some bituminous-coal mines.

Estimate of known recoverable reserves of coking coal in Clearfield County, Pa.

Mechanical mining in some bituminous-coal mines.

Mechanical mining in some bituminous-coal mines :progress report 9 : face haulage

Published Year

• 1950-1959 (3)
• 1960-1969 (1)

Subject

• Bituminous coal industry--United States (3)
• Coal-mining machinery (3)
• Coal--Pennsylvania (1)
• Coking coal (1)

Author

• Dowd, J. J. (4) *
• Shields, J. J. (3)
• Haley, W. A. (2)
• Abernethy, R. F. (1) *
• Blaylock, D. W. (1)
• Magnuson, M. O. (1)
• Reynolds, D. A. (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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