00437nam a2200145Ia 4500003000900000008004100009040001600050080001600066100002200082245009600104250001200200260004300212300001500255650002100270IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a681.31bULL  aUllman, Jeffrey D 0aPrinciples of database systemscJeffrey D Ullman                                             a2nd ed.  aNew DelhibGalgotia Publicationsc1985  avii, 484p.  aDatabase systems