00374nam a22001457a 4500003000400000008004100004082001800045100001800063245004400081260004300125300001100168650001700179650001700196650001500213OSt221026b        |||||||| |||| 00| 0 eng d  a511.322bP91E  aPrasad, Lalji  aElements of set theory/by Lalji Prasad   aPatna:bPolygon Printing Press,c1985.  a240 p.  aPure Science  a Mathematics  aSet Theory