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Underground Miners – Dedicated to preserving Pennsylvania's anthracite coal mining heritage.
Deep underground in Pennsylvania's Anthracite coal region – The Lawawana Coal Mine & Museum – Canadian Military History
History of coal mining - Wikipedia
Exploring Coal by NEED Project - Issuu
Deep underground – Coal mining in Pennsylvania's Anthracite Region – Canadian Military History
Coal mining operation has a future – The Morning Call
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Photo essay - Uneven Earth
Drifts, Bells, and Shafts: A History of Coal Mining since the Ancient World - Brewminate: A Bold Blend of News and Ideas
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