00761nam0-22002771i-450-990001321160403321000132116FED01000132116(Aleph)000132116FED0100013211620000920d1988----km-y0itay50------baengAdditive groups of ringsS. Feigelstock.Harlow (UK)Longman1988.V. II, 100 p.25 cmPitman research notes in mathematics series169512.2Feigelstock,S.56799ITUNINARICAUNIMARCBK990001321160403321C-2-(1698610MA1MA1Additive groups of rings343190UNINAING01