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3 results returnedSmall-scale placer-mining methods
Small-scale placer-mining methods
Lead and zinc mining and milling in the United States :current practices and costs
Published Year
Subject
- Gold mines and mining (2)
- Placer deposits (2)
- Lead mines and mining--United States (1)
- Ore-dressing (1)
- Zinc mines and mining--United States (1)
Author
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