00295nam a2200121Ia 4500082001800000100002500018245002800043260003400071300002000105490003800125500000500163700000500168  a512bSe457.TG  aSehgal, Sudarshan K.  aTopics in group ringsb  aNew YorkbMarcel Dekkerc1978  avi, 251p. Index  aPure and Applied Mathematicsv 50  a  a