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035   $a(CKB)5470000002461997
035   $a(OCoLC)891382554
035   $a(EXLCZ)995470000002461997
100   $a20140926d1966      ua             0
101 0 $aeng
135   $aurmn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aAeromagnetic and tectonic analysis of the Upper Mississippi Valley zinc-lead district $ea magnetic study indicating major geologic structures in the basement rock which controlled in part the locations of overlying ore deposits /$fby Allen V. Heyl and Elizabeth R. King ; prepared in cooperation with the Wisconsin Geological and Natural History Survey
210  1$a[Washington, D.C.] :$cUnited States Department of the Interior, Geological Survey,$d1966.
210  2$aWashington :$cUnited States Government Printing Office.
215   $a1 online resource (16 pages, 1 page of plates) $cillustrations, color map
225 1 $aGeological Survey bulletin ;$v1242-A
225 1 $aContributions to economic geology
300   $aTitle from title screen (viewed September 15, 2014).
320   $aIncludes bibliographical references (pages 15-16).
517   $aAeromagnetic and tectonic analysis of the Upper Mississippi Valley zinc-lead district 
606   $aGeology, Structural$xAnalysis
606   $aAeromagnetic prospecting$xAnalysis
606   $aGeology$zMississippi River Valley
606   $aOre deposits$zMississippi River Valley
615  0$aGeology, Structural$xAnalysis.
615  0$aAeromagnetic prospecting$xAnalysis.
615  0$aGeology
615  0$aOre deposits
700   $aHeyl$b Allen V$g(Allen Van),$f1918-2008,$01387333
702   $aKing$b Elizabeth R.
712 02$aGeological Survey (U.S.),
712 02$aWisconsin Geological and Natural History Survey,
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
801  2$bGPO
906   $aBOOK
912   $a9910707150103321
996   $aAeromagnetic and tectonic analysis of the Upper Mississippi Valley zinc-lead district$93457905
997   $aUNINA