@book{7518,
	author = {ULLMAN, JEFFREY D. and WIDON, JENNIFER.},
	title = {INTRODUCCION A LOS SISTEMAS DE BASES DE  DATOS/ },
	publisher = {PRENTICE HALL},
	year = {\\\\},
	address = {MEXICO: },
	note = {INCLUYE BIBLIOGRAFIAS E INDICE.}
}