00346nam a2200145Ia 4500008004100000020001800041082001000059082001000069100001600079100001300095245004600108260001400154260002300168260000900191230118s9999||||xx |||||||||||||| ||und||  a81-7041-397-4  a547.2  bTYA/A  ao.d btyagi  bm  yadav 2aa text book of organic reaction mechanism  anew delhi  banmol publications  c1990