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

Keyword Search

Longwall mining methods in some mines of the Middle Western states

Published Year

• 1930-1939 (1) *

Subject

• Longwall mining--Equipment and supplies (1) *

Author

• Toenges, Albert L. (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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