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

Keyword Search

Diamond-drilling blast holes, Bellefonte Mine, National Gypsum Co., Centre County, Pa.

Published Year

• 1940-1949 (1)

Subject

• Blasting (1)
• Boring machinery (1)
• Diamond bits (1)
• Mines and mineral resources--Pennsylvania--Centre--Equipment and supplies (1) *
• Rock-drills (1)

Author

• Mosier, McHenry. (1) *

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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