00873cam a22002411 4500 gs 42000209 DLC 20260227111348.0 770315s1942 pauabf s000 0 eng gs 42000209 (OCoLC)2803221 DLC OT OCoLC DLC QE157 .C55 557.48 Cleaves, Arthur B. (Arthur Bailey), 1905- Guidebook to the geology of the Pennsylvania turnpike, by A. B. Cleaves and Geo. H. Ashley. Harrisburg, Pa., Dept. of Internal Affairs, Topographic and Geologic Survey, 1942. iv, 37 p. illus. (incl. maps) plates. 23 cm. Pennsylvania. Geologic survey (4th, 1919- ). Bulletin G 20 Geology Pennsylvania Pennsylvania Turnpike (Pa.) Ashley, Geo. H. (George Hall), 1866- 27811 27811