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100   $a20160707d1977      ua             0
101 0 $aeng
135   $aurbn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aEnvironmental geology, Allegheny County and vicinity, Pennsylvania $edescription of a program and its results /$fby Reginald P. Briggs ; prepared in cooperation with the Appalachian Regional Commission
210  1$a[Reston, Virginia] :$cUnited States Department of the Interior, Geological Survey,$d1977.
215   $a1 online resource (iv, 25 pages) $cmaps
225 1 $aGeological Survey circular ;$v747
300   $a"Summary description of geologic and hydrologic studies."
517   $aEnvironmental geology, Allegheny County and vicinity, Pennsylvania 
606   $aLand use$xEnvironmental aspects$zPennsylvania$zAllegheny County
606   $aMine subsidences$zPennsylvania$zAllegheny County
606   $aLandslides$zPennsylvania$zAllegheny County
606   $aGeology$zPennsylvania$zAllegheny County
606   $aSubsidences (Earth movements)$zPennsylvania$zAllegheny County
606   $aLandslides$2fast
606   $aSubsidences (Earth movements)$2fast
607   $aPennsylvania$zAllegheny County$2fast
615  0$aLand use$xEnvironmental aspects
615  0$aMine subsidences
615  0$aLandslides
615  0$aGeology
615  0$aSubsidences (Earth movements)
615  7$aLandslides.
615  7$aSubsidences (Earth movements)
700   $aBriggs$b Reginald P.$f1929-2009,$01387151
712 02$aGeological Survey (U.S.),
712 02$aAppalachian Regional Commission.
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
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801  2$bGPO
906   $aBOOK
912   $a9910711728503321
996   $aEnvironmental geology, Allegheny County and vicinity, Pennsylvania$93459404
997   $aUNINA