Prospecting for gemstones and minerals indal
Sinkankas, John
Prospecting for gemstones and minerals indal - - New York Van Nostrand Reinhold Company 1970 - xviii,397p.
Drilling and boring Shaft sinking Well boring Boring Wells Hydraulic engineering Mining Engineering Tunnels Water supply engineering
622
Prospecting for gemstones and minerals indal - - New York Van Nostrand Reinhold Company 1970 - xviii,397p.
Drilling and boring Shaft sinking Well boring Boring Wells Hydraulic engineering Mining Engineering Tunnels Water supply engineering
622