Hanna coal mining handout

Hanna coal mining handout
Historical images from coal mining near Hanna, WY. Presented at the 2009 Teaching Energy workshop.

File 17043 is a 1.4MB Acrobat (PDF)
Uploaded: Jun15 09
http://d32ogoqmya1dw8.cloudfront.net/files/NAGTWorkshops/energy09/hanna_coal_mining_handout.pdf

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