00948cam a22002651  4500001001300000003000400013005001700017008004100034010001700075035001900092040005300111042001200164043001200176050002200188110006300210245004700273260005500320300005300375490002200428500007100450500003800521650002700559810007900586999001700665gs 15000427 DLC20260227111317.0790410s1914    paubf        s000 0 eng c  ags 15000427   a(OCoLC)4841524  aU.S. Geological Survey. LibrarycNcRSdNcRSdDLC  apremarc  an-us-pa00aGA61.P4bA5 no. 21 aPennsylvania.bTopographic and Geologic Survey Commission.10aGeologic map of southwestern Pennsylvania.  aHarrisburg, Pa.,bW. S. Ray, State Printer,c1914.  a30 p.b10 plates (part col., incl. maps)c24 cm.1 aIts Reportvno. 2  aAt head of title: Topographic and Geologic Survey of Pennsylvania.  aText and plates are in portfolio. 0aGeologyzPennsylvania.1 aPennsylvania.bTopographic and Geologic Survey Commission.tReportvno. 2.  c25525d25525