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8 results returnedSummary of ore-mining cost data
Lead and zinc mining and milling in the United States :current practices and costs
Summary of drifting and crosscutting cost data
Annual report of the Mining Division for the fiscal year 1937
Federal placer-mining laws and regulations
Federal placer-mining laws and regulations,
Annual report of the Mining Division, for the fiscal year 1938
Published Year
Subject
- Mining law--United States (2)
- Ore-dressing (2)
- Placer mining (2)
- Lead mines and mining--United States (1)
- Mineral industries--United States (1)
- Mineral industries--United States--Statistics (1)
- Mines and mineral resources--United States (1)
- Mining engineering (1)
- Zinc mines and mining--United States (1)
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