00331nam a2200121 a 450000500170000008200200001710000060003711000370004324500430008025000120012326000520013530000220018720251203090503.0  a510.25,bD, wor  d_  aInternational Mathematical Union  aWorld directory of mathematicians 1986  a8th ed.  aProvidence: American mathematical societyc1986  axix, 950p, 23 cm.