LEADER 01510oam  2200421I  450 
001 9910706970003321
005 20180406170101.0
035   $a(CKB)5470000002459776
035   $a(OCoLC)1030771470
035   $a(EXLCZ)995470000002459776
100   $a20180406d1949      ua             0
101 0 $aeng
135   $aur|||||||||||
181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 14$aThe Leadville drainage tunnel, Lake County, Colo. /$fby Robert A. Elgin, M.E. Volin, and James W. Townsend
210  1$a[Washington, D.C.] :$cU.S. Department of the Interior, Bureau of Mines,$d1949.
215   $a1 online resource (72 unnumbered pages) $cillustrations, maps
225 1 $aR. I. ;$v4493
300   $aAt head of title: United States Department of the Interior, Bureau of Mines.
300   $a"August 1949."
300   $aIncludes tables.
320   $aIncludes bibliographical references.
606   $aMines and mineral resources$zColorado$zLake County
606   $aMines and mineral resources$zColorado$zLeadville
615  0$aMines and mineral resources
615  0$aMines and mineral resources
700   $aElgin$b Robert A.$01409905
702   $aVolin$b M. E$g(Melden Earl),
702   $aTownsend$b James W.
712 02$aUnited States.$bBureau of Mines,
801  0$bGPO
801  1$bGPO
906   $aBOOK
912   $a9910706970003321
996   $aThe Leadville drainage tunnel, Lake County, Colo$93497525
997   $aUNINA