00273nam a2200121Ia 4500008004100000100001900041245002100060260002200081300000800103650001600111942000700127999001700134190216s9999||||xx |||||||||||||| ||und||  aAmit M Agarwal 0aPlay With Graphs  bArihant Prakashan  a183  aMathematics  cBK  c32140d32140