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

Keyword Search

Shaft sinking by rotary drilling

Published Year

• 1940-1949 (1)

Subject

• Rotary drilling (1) *
• Shaft sinking (1)

Author

• Platt, D. H. (1) *

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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