00876cam a22002291  4500001001300000003000400013005001700017008004100034010001700075035001900092040004000111050001600151100003000167245007100197260009400268300006300362440002000425500006900445500007600514504002900590650002700619gs 39000356 DLC20260227111345.0770602s1939    pauab         000 0 eng c  ags 39000356   a(OCoLC)3012184  aU.S. Geol. Survey. LibrarycOTdDLC00aQE157b.W531 aWillard, Bradford,d1894-10aHighway geology, Philadelphia to Pittsburgh,cby Bradford Willard.  aHarrisburg, Pa.,bDepartment of internal affairs, Topographic and geologic survey,c1939.  a2 p.l., 42 p.billus., 2 maps (1 fold.) fold. tab.c23 cm. 0aBulletin G,v12  aAt head of title: Pennsylvania Geological survey, Fourth series.  aOn cover: Commonwealth of Pennsylvania. Department of internal affairs.  a"References":  p. 27-28. 0aGeologyzPennsylvania.