A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mining methods at Carson hill mine, Calaveras County, Calif.
History; geology; vein systems; characteristics of ore and enclosing rocks, as related to mining method; sampling; development and mining; underground transportation; natural ventilation; fire hazards; safety and first aid; costs.
Mining methods at Carson hill mine, Calaveras County, Calif.
History; geology; vein systems; characteristics of ore and enclosing rocks, as related to mining method; sampling; development and mining; underground transportation; natural ventilation; fire hazards; safety and first aid; costs.
Mining methods at Carson hill mine, Calaveras County, Calif.
U S Bur Mines -- Information Cir
1937
15 pages
Supp plates
Report
English
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