000 00354pam a2200157a 44500
008 230515b1989 xxu||||| |||| 00| 0 eng d
020 _aNULL
041 _aENGL
082 _a001.61 /ULL
100 _aULLMAN J.O.
245 _aPRINCIPLES OF DATABASE SYSTEMS
250 _aN.D.
260 _aNULL
_bGALGO
_c1989
300 _a484 PB
650 _aNULL
999 _c621190
_d621190