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	1.	The Pennsylvania geological survey; administrative report, by Geo. H. Ashley. by Pennsylvania. Bureau of Topographic and Geologic Survey Ashley, Geo. H. (George Hall), 1866- Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Dept. of internal affairs, Topographic and geologic survey, 1931 Availability: No items available. Add to cart (remove)
	2.	Building stones of Pennsylvania / by Ralph W. Stone. by Stone, Ralph W. (Ralph Walter), 1876-1964 Pennsylvania. Bureau of Topographic and Geologic Survey Series: Bulletin M ; 15 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1932 Availability: No items available. Add to cart (remove)
	3.	Ground water in northwestern Pennsylvania / by R. M. Leggette, with analyses by Margaret D. Foster, W. L. Lamar, and S. K. Love. by Leggette, R. M. (Ralph Maxwell), 1899- Foster, Margaret D. (Margaret Dorothy), 1895- Lamar, William L. (William Luther), 1905- Love, S. K. (Samuel Kenneth), 1903- Geological Survey (U.S.) Series: Bulletin W ; 3. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg : Pa. Dept. of Internal Affairs, Topographic and Geologic Survey, 1936 Availability: No items available. Add to cart (remove)
	4.	Recent geological history of the Delaware Valley below the Water Gap / by Freeman Ward. by Ward, Freeman, 1879- Series: Bulletin G ; 10 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa. : Dept. of Internal Affairs, Topographic and Geologic Survey, 1938 Availability: No items available. Add to cart (remove)
	5.	Ground-water resources of Pennsylvania, by Stanley W. Lohman. Prepared in cooperation between the Geological Survey, United States Department of the Interior, and the Pennsylvania Topographic and Geologic Survey. by Lohman, Stanley William, 1907- Geological Survey (U.S.) Series: Bulletin W ; 7. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Dept. of Internal Affairs, Topographic and Geologic Survey, 1941 Availability: No items available. Add to cart (remove)
	6.	Guidebook to the geology of the Pennsylvania turnpike, by A. B. Cleaves and Geo. H. Ashley. by Cleaves, Arthur B. (Arthur Bailey), 1905- Ashley, Geo. H. (George Hall), 1866- Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Dept. of Internal Affairs, Topographic and Geologic Survey, 1942 Availability: No items available. Add to cart (remove)
	7.	Lehigh county, Pennsylvania. Geology and geography, by Benjamin LeRoy Miller ... with chapters on Pre-Cambrian geology, by Donald McCoy Fraser ... Jacksonburg formation, by Ralph LeRoy Miller ... Martinsburg formation, by Bradford Willard ... Triassic rocks, by Edgar T. Wherry. by Miller, Benjamin L. (Benjamin LeRoy), 1874-1944 Fraser, Donald McCoy, 1903- Miller, Ralph L. (Ralph LeRoy), 1909- Willard, Bradford, 1894- Wherry, Edgar Theodore, 1885- Series: Bulletin C ; 39. Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Dept. of internal affairs, Topographic and geologic survey, 1941 Availability: No items available. Add to cart (remove)

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