00282nam a2200109Ia 4500082002000000100002900020245004800049260003600097300002900133500000500162700000500167  a510.9bSt814.MT  aSteen, Lynn Arthurd ed.  aMathematics today, twelve informal essaysb  aNew YorkbSpringer-Verlagc1978  aviii, 367p. Index, Bibl.  a  a