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020			_c160
040			_aMAIN
041			_aEnglish
082			_a005.74 _bULL
100			_aUllman, Jeffrey D.
245		0	_aPrinciples of database systems
250			_a2nd ed.
260			_aNew Delhi _b; Galgotia Publications _c, 1987
300			_avii,484p.
650			_aComputer Database
650			_aDatabase Systems
650			_aDbms
942			_cBK
999			_c124446 _d124446