00283nam a2200109Ia 4500008004100000040001500041082002200056100002200078245005500100260000900155300000900164231128s9999    xx            000 0 und d  aPHSAcPHSA  aCIR  540 D78 1977  aDrago, Russell S. 0aPrinciples of chemistry with practical perspective  c1977  a  p.