00255nam a2200109Ia 4500008004100000100001500041245002600056260002300082650001600105942000700121999001700128190216s9999||||xx |||||||||||||| ||und||  aKhanna.M.L 0aDifferential Geometry  bJaiprakashnath&Co:  aMathematics  cBK  c30680d30680