01099cam a2200301   4500001001300000003000400013005001700017008004100034010002300075040004500098043001200143050002300155110002900178245007300207260005300280300004500333490002300378500005000401500003700451504002900488650003900517650005900556650004100615650004100656740004300697830004000740999001700780gs 66000256 DLC20260227111419.0690605m19601966dcuab    b    000 0 eng c  ags 66000256 //r983  aU.S. Geological Survey LibrarycDLCdDLC  an-usm--10aQE75b.B9 no. 112320aGeological Survey (U.S.)10aGeology of parts of the upper Mississippi Valley zinc-lead district.0 aWashington,bU.S. Govt. Print. Off.c[1960-1966]  a571 p.billus., maps (part col.)c24 cm.1 aBulletinvno. 1123  aPart of illustrative matter folded in pocket.  aIssued as separate chapters A-I.  aIncludes bibliographies. 0aGeologyzMississippi River Valley. 0aMines and mineral resourceszMississippi River Valley. 0aLead oreszMississippi River Valley. 0aZinc oreszMississippi River Valley. 1aMississippi Valley zinc-lead district. 0aGeological Survey bulletin ;v1123.  c30243d30243