00399nam a2200133 a 450000500170000008200160001710000060003311000230003924500290006226000360009130000210012749000400014850000770018820251203091009.0  a510.8,bRIN  d_  aOystaeyen, F., Van  aRing theory antwerp 1980  aNew YorkbSpringer-Verlagc1980  avi, 209p, 22 cm.  aLecture notes in mathematicsdv.825  aProceedings University of Antwerp U.I.A. Antwerp, Belgiumm, May 6-9,1980