00672nam0-22002411i-450-990001292940403321000129294FED01000129294(Aleph)000129294FED0100012929420000920d1985----km-y0itay50------baengGROUP actions on ringsSusan Montgomery, EditorProvidence (RI)American Mathematical Society1985Contemporary mathematicas, 43ITUNINARICAUNIMARCBK990001292940403321C-1-(432158MA1MA1GROUP actions on rings383701UNINAING01