Deep underground – Coal mining in Pennsylvania's Anthracite Region – Canadian Military History

Coal mining operation has a future – The Morning Call

Deep underground – Coal mining in Pennsylvania's Anthracite Region – Canadian Military History

Drifts, Bells, and Shafts: A History of Coal Mining since the Ancient World - Brewminate: A Bold Blend of News and Ideas

History of anthracite coal mining in Pennsylvania - Wikipedia

Deep underground – Coal mining in Pennsylvania's Anthracite Region – Canadian Military History

The First Underground Anthracite Mine Historical Marker

First report of progress in the anthracite coal region : the geology of the Panther creek basin in eastern end of the southern field - Pennsylvania Geology - Penn State University Libraries' Digital Collections

New ideas for abandoned mine lands - WHYY

Coal mining - Wikipedia

Coal Mining The Canadian Encyclopedia