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An act providing for the health and safety of persons employed in coal mines
Historical Society of Pennsylvania - Closed Stacks Vq*.29
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- Format:
- Book
- Language:
- English
- Subjects (All):
- Ventilation of mines.
- Local Subjects:
- Ventilation of mines.
- Physical Description:
- 11 p. ; cm. (8vo)
- Place of Publication:
- [S.l.]
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