Technical Report Archive and Image Library (TRAIL) - Browse

ABOUT BROWSE FEED

Copper Mining in North America

Description: From introduction: "In this paper are assembled and summarized many subjects relating to the copper industry in North America. Production of mines and districts, history of the industry in North America. Production of mines and districts, history of the industry, geology, of the principal deposits, and mining methods and costs are discussed."
Date: 1938
Creator: Gardner, E. D.; Johnson, C. H. & Butler, B. S
Item Type: Report
Partner: UNT Libraries Government Documents Department

Stopping Methods and Costs

Description: No Description Available.
Date: 1936
Creator: Jackson, Charles Freeman & Gardner, E. D.
Item Type: Report
Partner: UNT Libraries Government Documents Department