00283nam a2200109Ia 4500008004100000041000800041082001900049100002200068245003600090260003900126300000800165211209s1997    xx            000 0 und d  aeng  a005.74 N97 ULL  aULLMAN, JEFFREY D  aPRINCIPLES OF DATABASE SYSTEMS   aNEW DELHIbGALGOTIA PUB LTD.c1997  a484