00369nam a2200157Ia 4500008004100000020000900041035000900050082001500059100001800074245003100092250000600123260006000129300000800189500000800197650000600205210723s9999||||xx |||||||||||||| ||und||  aNULL  a7331  a547.2BBAN  aBansal, R. K. 0aOrganic Eaction Mechanisms  a-  aN. DelhibTata McGraw - Hill Publishing Company Limited  a489  a593  a-