00507nam a2200205 a 450000500170000002000180001708200150003510000210005024500220007126000180009349000130011149000380012450000670016260000080022963000160023763000160025363000200026985600060028985600060029520251219160015.0  a9783111700700  a512.4bJES  aJespers, Ericd_  aGroup ring groups  aDe Gruyterc_  aVolume 2  aStructure Theorems of Unit Groups  aInculdes bibliographical refrence, index of notation and index  bc_  aGroup rings  aRing theory  aRings (Algebra)  f_  a_