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

Keyword Search

Methods and costs of mining at Barr mine, Tri-State zinc and lead district

Published Year

• 1920-1929 (1) *

Subject

• Mining engineering (1)

Author

• Keener, Oliver W. (1) *

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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