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100   $a20140901d1995      ua             0
101 0 $aeng
135   $aurn||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aIsotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado $esummary and discussion /$fby Alan R. Wallace
210  1$aWashington :$cUnited States Government Printing Office,$d1995.
215   $a1 online resource (iv, 51 pages) $cillustrations, maps
225 1 $aU.S. Geological Survey bulletin ;$v2104
300   $aTitle from title screen (viewed August 25, 2014).
300   $aAlso available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
320   $aIncludes bibliographical references (pages 16-18).
517   $aIsotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado 
606   $aGeology$zColorado$zLeadville Region
606   $aGeology, Stratigraphic
606   $aRadioactive dating$zColorado$zLeadville Region
615  0$aGeology
615  0$aGeology, Stratigraphic.
615  0$aRadioactive dating
700   $aWallace$b Alan R.$01384123
712 02$aGeological Survey (U.S.),
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
801  2$bGPO
906   $aBOOK
912   $a9910708612203321
996   $aIsotopic geochronology of the Leadville 1° x 2° quadrangle, west-central Colorado$93458269
997   $aUNINA