00247nam a2200109 a 450000500170000002000150001710000180003224500360005025000080008626000230009430000200011720251203091320.0  a0748761624  aNorman,R.O.C.  aPrinciples of organic synthesis  a2nd  aChapman&Hallc1978  a800p.c26 cm PB