A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Mining methods and costs at interstate zinc and lead co's Hartley mine, tri-state zinc and lead district
Mine 1/4 mi west of Baxter Spring, Kan; history; geology; exploration and development; mining methods; average cost for 6 mo, mining by open rooms with pillar support, $0.8281 per ton. (see also Explosives Engr v 10 n 11 Nov 1932 p 341-5)
Mining methods and costs at interstate zinc and lead co's Hartley mine, tri-state zinc and lead district
Mine 1/4 mi west of Baxter Spring, Kan; history; geology; exploration and development; mining methods; average cost for 6 mo, mining by open rooms with pillar support, $0.8281 per ton. (see also Explosives Engr v 10 n 11 Nov 1932 p 341-5)
Mining methods and costs at interstate zinc and lead co's Hartley mine, tri-state zinc and lead district
U S Bur Mines -- Information Cir
Anderson, C.N. (author)
1932
16 pages
Supp plates
Article (Journal)
English
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