02191oam 2200577 450 991071172850332120190110095903.0(CKB)5470000002486789(OCoLC)953209328(OCoLC)995470000002486789(EXLCZ)99547000000248678920160707d1977 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierEnvironmental geology, Allegheny County and vicinity, Pennsylvania description of a program and its results /by Reginald P. Briggs ; prepared in cooperation with the Appalachian Regional Commission[Reston, Virginia] :United States Department of the Interior, Geological Survey,1977.1 online resource (iv, 25 pages) mapsGeological Survey circular ;747"Summary description of geologic and hydrologic studies."Environmental geology, Allegheny County and vicinity, Pennsylvania Land useEnvironmental aspectsPennsylvaniaAllegheny CountyMine subsidencesPennsylvaniaAllegheny CountyLandslidesPennsylvaniaAllegheny CountyGeologyPennsylvaniaAllegheny CountySubsidences (Earth movements)PennsylvaniaAllegheny CountyLandslidesfastSubsidences (Earth movements)fastPennsylvaniaAllegheny CountyfastLand useEnvironmental aspectsMine subsidencesLandslidesGeologySubsidences (Earth movements)Landslides.Subsidences (Earth movements)Briggs Reginald P.1929-2009,1387151Geological Survey (U.S.),Appalachian Regional Commission.COPCOPOCLCOOCLCFOCLCAGPOBOOK9910711728503321Environmental geology, Allegheny County and vicinity, Pennsylvania3459404UNINA