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The treatment and sale of black sands
Saving gold by means of corduroy
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Published Year
1930-1939 (2)
Subject
Black sand (1)
Corduroy (1)
Gold mines and mining--Handbooks, manuals, etc (1)
Gold--Milling (1)
Hydraulic mining--Handbooks, manuals, etc (1)
Placer deposits (1)
Author
Bernewitz, M. W. (2) *
