00518nam a2200181 a 450000500170000002000150001708200150003210000150004724500320006226000290009430000220012349000460014569000180019196400240020999700180023399900170025195200680026820251203110222.0  a1852332069  a512.4bCOH  aCohn, P.M.  aIntroduction to ring theory  aNew YorkbSpringerc2000  ax,229p.c22cm. PB  aSpringer undergraduate mathematics series  aRing(Algebra)  bENGcd512ePBfg_  a98205 LIBSC C  c82063d82063  00104070aPUbPUd2001-01-11g878.82l0o512.4 COHp98205yBK