01257cam a22003011 4500 gs 31000177 DLC 20260227111335.0 750613s1931 pauabf s000 0 eng gs 31000177 (OCoLC)1391856 DLC OT OCoLC PBfG OCoLC DLC premarc QE157 .A83 PY G345/4.3 G1 padocs Ashley, Geo. H. (George Hall), 1866- A syllabus of Pennsylvania geology and mineral resources / by George H. Ashley. Harrisburg : Department of internal affairs, Topographic and geologic survey, 1931. 160 p. incl. ill., maps, tables, diagrs. : II pl. (fold. col. map, fold. tab.) ; 23 cm. Pennsylvania Geological survey, 4th (1919- ) Bulletin G1 "Publications of the present [Pennsylvania] Geological survey": p. 147-150. "Publications of the second Geological survey": p. 152-154. "List of U. S. Geological survey publications on Pennsylvania": p. 155-158. Geology Pennsylvania. Mines and mineral resources Pennsylvania. Geology Pennsylvania Bibliography. Bulletin G ; 1. 26889 26889