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

Keyword Search

Electronic mine-shaft signal system at Magma Copper Co., Superior, Ariz.

Published Year

• 1940-1949 (1)

Subject

• Copper mines and mining--Safety measures--Arizona (1)
• Mine safety--Arizona (1)

Author

• Loesche, H.C. (1) *

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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