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100   $a20080609d2008      ua             0
101 0 $aeng
135   $aurmn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 14$aThe Yampa Bed, a regionally extensive tonstein in the Williams Fork Formation, northwestern Piceance Creek and southern Sand Wash Basins, Colorado$b[electronic resource] /$fby Michael E. Brownfield and Edward A. Johnson
205   $aVersion 1.0.
210  1$aReston, Va. :$cU.S. Dept. of the Interior, U.S. Geological Survey,$d2008.
215   $avi, 32 pages $cdigital, PDF file
225 1 $aContributions to stratigraphy
225 1 $aScientific investigations report ;$v2008-5033
300   $aTitle from PDF title screen (viewed on June 6, 2008).
320   $aIncludes bibliographical references (pages 30-32).
606   $aTonsteins$zWilliams Fork Formation (Colo. and Utah)
615  0$aTonsteins
700   $aBrownfield$b M. E$01382516
701   $aJohnson$b Edward A$g(Edward Allison),$f1940-$01384115
712 02$aGeological Survey (U.S.)
801  0$bGIS
801  1$bGIS
801  2$bGPO
906   $aBOOK
912   $a9910696712403321
996   $aThe Yampa Bed, a regionally extensive tonstein in the Williams Fork Formation, northwestern Piceance Creek and southern Sand Wash Basins, Colorado$93464748
997   $aUNINA