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

Keyword Search

Methods and costs of mining fluorspar from a flat-bedded deposit at Cave-In-Rock, Ill.

Published Year

• 1940-1949 (1) *

Subject

• Fluorspar industry--Illinois (1) *
• Fluorspar--Illinois (1)

Author

• Needham, A. B. (1)

• About TRAIL
• FAQ
• Join TRAIL
• Contact Us

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