@book{9508,
	author = {Lipschutz, Seymour and Castaño, Jesús María,},
	title = {Teoria y Problemas de Teoría de Conjuntos y Temas Afines /},
	publisher = {McGraw-Hill,},
	year = {1970.},
	series = {Compendios Schaum},
	address = {México :}
}