00760cam a22002051  4500001001300000003000400013005001700017008004100034010001700075040003700092050001700129082001100146110006200157245008400219260008900303300003300392500006900425700004300494999001700537gs 31000068 DLC20260227111335.0900305s1931    pauab        s000 0 eng c  ags 31000068   aU.S. Geol. Survey Libr./ICUcICU00aQE157b.A31500a557.481 aPennsylvania.bBureau of Topographic and Geologic Survey.14aThe Pennsylvania geological survey;badministrative report,cby Geo. H. Ashley.  aHarrisburg, Pa.,bDept. of internal affairs, Topographic and geologic survey,c1931.  a38 p.billus. (map.)c23 cm.  aAt head of title: Pennsylvania geological survey, fourth series.1 aAshley, Geo. H.q(George Hall),d1866-  c26855d26855