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3 results returnedTentative inspection standards for anthracite mines
Inspection standards for bituminous-coal and lignite mines :revised July 1945.
Published Year
Subject
- Mine inspection--Standards--United States (3) *
- Anthracite coal industry--Standards--United States (1)
- Coal mines and mining (1)
- Coal mines and mining--Safety regulations--United States (1)
- Coal mines and mining--United States (1)
- Lignite industry--United States (1)
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