00820cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040002700111042001200138050002200150051002600172100005100198245007100249260004300320300006900363490004200432500005000474650003700524999001700561gs 19000035 DLC20260227111323.0760209s1918    dcuabf       f000 0 eng    ags 19000035   a(OCoLC)1979188  aDLCcIDeKNdOCoLCdDLC  apremarc00aQE75b.B9 no. 681  aTN483.C6bL8cCopy 2.1 aLoughlin, G. F.q(Gerald Francis),d1880-1946.14aThe oxidized zinc ores of Leadville, Colorado,cby G. F. Loughlin.  aWashington,bGovt. print. off.,c1918.  a91 p.bVIII pl. (part fold.; incl. map, diagrs.) diagrs.c24 cm.0 aU.S. Geological survey. Bulletinv681  aAt head of title: Department of the interior. 0aZinc mines and miningzColorado.  c25900d25900