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035   $a(CKB)5470000002457474
035   $a(OCoLC)896809991
035   $a(OCoLC)995470000002457474
035   $a(EXLCZ)995470000002457474
100   $a20141123d1972      ua             0
101 0 $aeng
135   $aurmn|||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aGravity and magnetic features as related to geology in the Leadville 30-minute quadrangle, Colorado /$fby Ogden Tweto and J. E. Case
210  1$aWashington :$cUnited States Department of the Interior, Geological Survey,$d1972.
215   $a1 online resource (iii, C31 pages) $cillustrations, maps +$e2 plates
225 1 $aGeological Survey professional paper ;$v726-C
225 1 $aGeophysical field investigations
300   $aTitle from title screen (viewed September 30, 2014).
320   $aIncludes bibliographical references (pages C29-C31).
330   $a"A summary and correlation of geologic and geophysical data on the most productive part of the Colorado mineral belt."
606   $aGeomagnetism$zColorado$zLeadville Region
606   $aGravity$zColorado$zLeadville Region
615  0$aGeomagnetism
615  0$aGravity
700   $aTweto$b Ogden$f1912-1983,$01393605
702   $aCase$b James E.$f1933-
712 02$aGeological Survey (U.S.),
801  0$bCOP
801  1$bCOP
801  2$bOCLCO
801  2$bGPO
906   $aBOOK
912   $a9910706797903321
996   $aGravity and magnetic features as related to geology in the Leadville 30-minute quadrangle, Colorado$93501291
997   $aUNINA