00286nam a2200109Ia 4500008004000000082001300040100002800053245003100081260002800112300000800140650002800148210210b1966   xxu||||| |||| 00| 0 eng d  a510 SCHO  aSCHAAF (William L), Ed.  aOur mathematical heritage.  aNYbCollier Booksc1966  a284  aMathematical heritage