00334nam a2200133Ia 4500003000400000005001700004008004100021082001800062100001700080245004600097250000800143260003900151300001000190TMU20260707151757.0160921s9999    xx            000 0 und d  a005.75bOcc-R  aOccardi, Val  aRelational Databases: Theory and Practice  a1st  bBPB Publicationsc1993a New Delhi  a304p.