00320nam a2200109Ia 4500082001900000100004500019245005400064260003600118300002200154500000500176700002900181  a510.9bEw94.PH  aEwing, John H. and Gehring, F. W.d eds.  aPaul Halmos celebrating 50 years of mathematicsb  aNew YorkbSpringer-Verlagc1991  aviii, 320p. Index  a  aGehring, F. W. ; jt. ed.