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035   $a(EXLCZ)995470000002396421
100   $a20090417d1972      ua             0
101 0 $aeng
135   $aurmn||||a||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aReports and maps of the Geological Survey released only in the open files, 1971$b[electronic resource] /$fby Betsy A. Weld, Kathleen T. Iseri, and George W. Brett
210  1$aWashington :$cU.S. Dept. of the Interior, Geological Survey,$d1972.
215   $a26 pages $cDJVU, image file
225 1 $aGeological Survey circular ;$v648
300   $aTitle from title screen (viewed Apr. 17, 2009).
300   $aIncludes index.
608   $aBibliographies.$2lcgft
700   $aWeld$b Betsy A$01388375
701   $aIseri$b Kathleen T$01388378
701   $aBrett$b George W$01388377
712 02$aGeological Survey (U.S.)
801  0$bGPO
801  1$bGPO
801  2$bGPO
906   $aBOOK
912   $a9910698743503321
996   $aReports and maps of the Geological Survey released only in the open files, 1971$93438906
997   $aUNINA