00265nam a2200109Ia 4500008004100000100003000041245002900071260001900100650001400119942000700133999001500140190216s9999||||xx |||||||||||||| ||und||  aTrifonov D N&Amp;Trifonov 0aSilhouettes Of Chemistry  bMir Publishers  aChemistry  cBK  c2757d2757