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2 results returnedAccident experience and cost in Pennsylvania anthracite and bituminous mines :1926-30
A study of mine roof of the coking district of Western Pennsylvania
Published Year
Subject
- Industrial accidents--Pennsylvania (2) *
- Coal mine accidents--Pennsylvania (1)
- Coal mines and mining--Pennsylvania (1)
- Coke--Pennsylvania (1)
- Mine safety--Pennsylvania (1)
Author
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