Excerpt from Annual Report on the Geological Survey of Pennsylvania Sir - In compliance with the third section of the act Of 29th March, 1836, 'entitled, An Act

Excerpt from Fifth Annual Report on the Geological Survey of Pennsylvania Sm - In compliance with the Act of Assembly, requiring the State Geologist to submit t

Excerpt from Annual Report of the Geological Survey of Pennsylvania for 1885 Chapter III - General Geology Upper Productive and Barren Coal Measure Series; feat

Excerpt from Annual Report of the Geological Survey of Pennsylvania for 1885-1887, Vol. 1 About the Publisher Forgotten Books publishes hundreds of thousands of

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