LEADER 02081oam 2200589I 450 001 9910711649403321 005 20181211073352.0 035 $a(CKB)5470000002485568 035 $a(OCoLC)953258873$z(OCoLC)944376854 035 $a(OCoLC)995470000002485568 035 $a(EXLCZ)995470000002485568 100 $a20160708d1951 ua 0 101 0 $aeng 135 $aurbn||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aExploratory drilling in the Prairie du Chien group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-1950 /$fby Allen V. Heyl, Jr., Erwin J. Lyons, and Allen F. Agnew. ; prepared in cooperation with the Wisconsin Geological and Natural History Survey 210 1$aWashington, D.C. :$cUnited States Department of the Interior, Geological Survey,$d1951. 215 $a1 online resource (i, 35 pages) $cillustrations, maps 225 1 $aGeological Survey circular ;$v131 300 $a"November 1951." 320 $aIncludes bibliographical references (page 16). 606 $aBorings$zWisconsin 606 $aLead ores$zWisconsin 606 $aZinc ores$zWisconsin 606 $aBorings$2fast 606 $aLead ores$2fast 606 $aZinc ores$2fast 607 $aWisconsin$2fast 615 0$aBorings 615 0$aLead ores 615 0$aZinc ores 615 7$aBorings. 615 7$aLead ores. 615 7$aZinc ores. 700 $aHeyl$b Allen V$g(Allen Van),$f1918-2008,$01387333 702 $aAgnew$b Allen F.$f1918-2012, 702 $aLyons$b Erwin J. 712 02$aGeological Survey (U.S.), 712 02$aWisconsin Geological and Natural History Survey. 801 0$bCOP 801 1$bCOP 801 2$bOCLCO 801 2$bOCLCF 801 2$bOCLCE 801 2$bOCLCA 801 2$bGPO 906 $aBOOK 912 $a9910711649403321 996 $aExploratory drilling in the Prairie du Chien group of the Wisconsin zinc-lead district by the U.S. Geological Survey in 1949-1950$93453904 997 $aUNINA