00297nam a2200109Ia 4500008004100000100001400041245005200055245005200107250000800159260001200167300000800179190311s9999    xx            000 0 und d  aSingh S.K 0aDatabase System Concepts, Desings & Application 0aDatabase System Concepts, Desings & Application  a2nd  BPearson  a912