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100   $a19990701d1996      ua             0
101 0 $aeng
135   $aurcn||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 00$aEcosystem trends and response$b[electronic resource] $eChesapeake Bay
210  1$aReston, VA :$c[U.S. Dept. of the Interior], U.S. Geological Survey,$d[1996]
225 1 $aU.S. Geological Survey fact sheet ;$vFS-213-96
300   $aTitle from title screen (viewed on Nov. 08, 2004).
517   $aEcosystem trends and response 
606   $aEstuarine ecology$zChesapeake Bay (Md. and Va.)
607   $aChesapeake Bay (Md. and Va.)
615  0$aEstuarine ecology
712 02$aGeological Survey (U.S.)
801  0$bAGL
801  1$bAGL
801  2$bOCLCQ
801  2$bGPO
906   $aBOOK
912   $a9910692918203321
996   $aEcosystem trends and response$93431077
997   $aUNINA