A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sound planning and hard work make this Alaskan placer pay
Placer operation near Ruby comprises stripping, excavating, sluicing, pumping, and hydraulicking; mining is done by excavating blocks of gravel 200 ft wide, 300 ft long, and treatment of gravel in recovery plant; cold weather problem.
Sound planning and hard work make this Alaskan placer pay
Placer operation near Ruby comprises stripping, excavating, sluicing, pumping, and hydraulicking; mining is done by excavating blocks of gravel 200 ft wide, 300 ft long, and treatment of gravel in recovery plant; cold weather problem.
Sound planning and hard work make this Alaskan placer pay
Min World
Grundstedt, H.G. (author)
Mining World ; 18
1956
3 pages
Article (Journal)
English
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