00268nam a2200109Ia 4500082001900000100001700019245007900036260002400115300000900139500000500148700000500153  a511.3bM547.SP  aMenon, V. V.  aSome partitions of, and the number of Borel fields on, large finite setsb  aCalcuttabISIc1969  a15p.  a  a