00298nam a2200109Ia 4500008004100000082001500041100002000056245005200076250000900128260004300137300000800180240913s9999||||xx |||||||||||||| ||und||  a510  KRI/C  aV Krishnamurthy 0aChallenge and Thrill of Pre-college Mathematics  aNULL  bNew Age InternationalaNew Delhic2012  a692