00497nam a2200169Ia 4500003000900000008004100009020001800050040001600068080001600084100001600100245010200116250001200218260004000230300001700270650002100287650001900308IN-BaIIA211028s9999    xx            000 0 eng d  a0-201-01530-7  cIIA Library  a519.68bDAT  aDate, C. J. 3aAn introduction to database systemscC. J. Date                                                    a2nd ed.  aMassachusettsbAddison-Wesleyc1977  axxiii, 536p.  aDatabase Systems  aNASA Thesaurus