00349nam a2200121   4500020001500000082001400015100001800029245004100047260005100088300000800139490004000147650004000187  a9555890617  a547.1 WAN  aG.P.Wannigama  astereochemistry of organic compounds  asri lankabScience education Publicationc2003  a112  aScience education Publication No.20  astereochemistry aorganic compounds