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On the Safety Lamp for Coal Miners; with some researches on flame
- "On the safety lamp for coal miners, with some researches on flame"
- "On the Safety Lamp for Coal Miners : with some researches on flame"
- "On the safety lamp for coal miners : with some researches on flame"
- "On the safety lamp for coal miners with some researches on flame"
- "On the Safety Lamp for Coal Miners; with some researches on flame"@en
- "On the safety lamp for coal miners with some researches on flame"@en
- "On the safety lamp for coal miners [microform] : with some researches on flame"