Your search returned 2 results.

Results
	1.	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)
	2.	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)

Refine your search