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	1.	The geology of Lehigh and Northampton Counties. General introduction by J.P. Lesley. Slate belt and quarries, by R.N. [i.e. H.] Sanders. Water gaps, by H.M. Chance. Limestone belt and iron ore mines, by F. Prime. Itinerary survey of the mountains, by C.E. Hall. by Geological Survey of Pennsylvania D'Invilliers, Edward Vincent, 1857-. Geology of the South Mountain belt of Berks Co Series: Report of progress (Geological Survey of Pennsylvania) ; D3, v. 1. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Board of Commissioners for the Second Geological Survey, 1883 Availability: No items available. Add to cart (remove)
	2.	The geology of the South Mountain belt of Berks County. by D'Invilliers, Edward Vincent, 1857- Series: Report of progress (Geological Survey of Pennsylvania) ; D3, v. 2, pt. 1. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Board of Commissioners for the Second Geological Survey, 1883 Availability: No items available. Add to cart (remove)

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