00929cam a22002411  4500001001300000003000400013005001700017008004100034010001700075035001900092040002400111050001700135100004700152245006500199260006600264300001800330490007000348500009300418500003900511650004700550830007300597999001700670gs 33000056 DLC20260227111337.0790611r1932uuuusdua         s000 0 eng    ags 33000056   a(OCoLC)5054009  aDLCcTxCMdDLCdWaU00aTN24.S8bR621 aRothrock, E. P.q(Edgar Paul),d1889-1977.12aA quarter century of mineral production,cby E. P. Rothrock.  aVermillion, South Dakota,bUniversity of South Dakota,c1932.  a55 l.billus.1 aSouth Dakota Geological Survey. Report of investigations,vno. 13  aAt head of title: South Dakota State Geological Survey, E. P. Rothrock, State Geologist.  aReproduced from type-written copy. 0aMines and mineral resourceszSouth Dakota. 0aReport of investigations (South Dakota Geological Survey) ;vno. 13.  c27003d27003