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	1.	Northampton county, Pennsylvania; geology and geography, by Benjamin LeRoy Miller, with a chapter on pre-Cambrian geology by Donald McCoy Fraser, and on the Jacksonburg formation by Ralph LeRoy Miller. by Miller, Benjamin L. (Benjamin LeRoy), 1874-1944 Fraser, Donald McCoy, 1903- Miller, Ralph L. (Ralph LeRoy), 1909- Willard, Bradford, 1894- Meyers, Philip B Behre, Chas. H. (Charles H.) Warmkessel, Carl A Series: Bulletin C ; 48 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Department of Internal Affairs, Topographic and Geologic Survey, 1939 Availability: No items available. Add to cart (remove)
	2.	The Devonian of Pennsylvania : Middle and upper Devonian / by Bradford Willard; Keyser limestone and Helderberg group, by Frank M. Swartz; Oriskany group, by Arthur B. Cleaves. by Pennsylvania. Bureau of Topographic and Geologic Survey Willard, Bradford, 1894- Swartz, Frank M. (Frank McKim), 1899- Cleaves, Arthur B. (Arthur Bailey), 1905- Series: Bulletin G ; 19 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa. : Dept. of internatl affairs, Topographic and geologic survey, 1939 Availability: No items available. Add to cart (remove)
	3.	Highway geology, Philadelphia to Pittsburgh, by Bradford Willard. by Willard, Bradford, 1894- Series: Bulletin G ; 12 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 Availability: No items available. Add to cart (remove)
	4.	Guide to the geology from Dauphin to Sunbury, by Bradford Willard. by Willard, Bradford, 1894- Series: Bulletin G ; 13 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 Availability: No items available. Add to cart (remove)
	5.	Guidebook to the geology near Reading, Pa., by Bradford Willard and Donald M. Fraser. by Willard, Bradford, 1894- Fraser, Donald McCoy, 1903- [joint author.] Series: Bulletin G ; 15 Material type: Text; Format: print ; Literary form: Not fiction Publication details: Harrisburg, Pa., Department of internal affairs, Topographic and geologic survey, 1939 Availability: No items available. Add to cart (remove)
	6.	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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