LEADER 01273nam 2200361Ia 450 001 9910698743803321 005 20090416150508.0 035 $a(CKB)5470000002396418 035 $a(OCoLC)318611639 035 $a(EXLCZ)995470000002396418 100 $a20090416d1974 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, 1973$b[electronic resource] /$fby Betsy A. Weld, Kathleen T. Iseri, and Marvin L. Millgate 210 1$aReston, Va. :$cU.S. Dept. of the Interior, Geological Survey,$d1974. 215 $a25 pages $cDJVU, image file 225 1 $aGeological Survey circular ;$v696 300 $aTitle from title screen (viewed Apr. 16, 2009). 300 $aIncludes index. 608 $aBibliographies.$2lcgft 700 $aWeld$b Betsy A$01388375 701 $aIseri$b Kathleen T$01388378 701 $aMillgate$b M. L$01409395 712 02$aGeological Survey (U.S.) 801 0$bGPO 801 1$bGPO 906 $aBOOK 912 $a9910698743803321 996 $aReports and maps of the Geological Survey released only in the open files, 1973$93541938 997 $aUNINA