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100   $a20140731d1956      ua             0
101 0 $aeng
135   $aurn||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aOrdovician and Silurian coral faunas of western United States /$fHelen Duncan
210  1$a[Washington, D.C.] :$c[U.S. Department of the Interior, U.S. Geological Survey],$d[1956]
210  2$a[Washington, D.C.] :$c[Government Printing Office]
215   $a1 online resource (iii, 209-236 pages, plates) $cillustrations, map
225 1 $aGeological Survey bulletin ;$v1021-F
225 1 $aA contribution to general geology
300   $aTitle from title screen (viewed July 21, 2014).
320   $aIncludes bibliographical references (pages 231-234) and index.
606   $aCorals, Fossil$zWest (U.S.)
606   $aPaleontology$zWest (U.S.)$ySilurian
606   $aPaleontology$zWest (U.S.)$yOrdovician
606   $aCorals, Fossil$2fast
606   $aOrdovician Geologic Period$2fast
606   $aPaleontology$2fast
606   $aSilurian Geologic Period$2fast
607   $aUnited States, West$2fast
615  0$aCorals, Fossil
615  0$aPaleontology
615  0$aPaleontology
615  7$aCorals, Fossil.
615  7$aOrdovician Geologic Period.
615  7$aPaleontology.
615  7$aSilurian Geologic Period.
700   $aDuncan$b Helen$01396296
712 02$aGeological Survey (U.S.),
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
801  2$bGPO
801  2$bOCLCF
801  2$bGPO
906   $aBOOK
912   $a9910704005803321
996   $aOrdovician and Silurian coral faunas of western United States$93456128
997   $aUNINA