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	1.	Geology of the oil and gas fields in Sewickley quadrangle, by M. J. Munn. Surveyed in co-operation with the United States Geological survey. by Munn, Malcolm John, 1874- Geological Survey (U.S.) Series: Pennsylvania. Topographic and geologic survey. Report ; no. 1 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, C. E. Aughinbaugh, printer to the stae of Pennsylvania, 1910 Availability: No items available. Add to cart (remove)
	2.	Graphite deposits of Pennsylvania, by Benjamin L. Miller ... by Miller, Benjamin L. (Benjamin LeRoy), 1874-1944 Series: Pennsylvania. Topographic and geologic survey. Report ; no. 6 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, C.E. Aughinbaugh, printer to the state of Pennsylvania, 1912 Availability: No items available. Add to cart (remove)
	3.	Minerals of Pennsylvania, by Amos P. Brown and Frederick Ehrenfeld. by Brown, Amos P. (Amos Peaslee), 1864-1917 Ehrenfeld, Frederick, 1872-1940 [joint author.] Series: Pennsylvania. Topographic and Geologic Survey. Report ; no. 9 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., W. S. Ray, 1913 Availability: No items available. Add to cart (remove)
	4.	Glass manufacture and the glass sand industry of Pennsylvania, by Charles Reinhard Fettke, Ph.D. by Fettke, Charles R. (Charles Reinhard), 1888-1959 Series: Pennsylvania. Topographic and geologic survey. Report no. XII Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Penna., J. L. L. Kuhn, printer, 1918 [i.e.1919] Availability: No items available. Add to cart (remove)

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