@book{98301,
	author = {Cheifetz, Philip M. and Avenoso, Frank J.},
	title = {Lógica y teoría de conjuntos},
	publisher = {Alhambra},
	year = {1974.},
	address = {Madrid},
	edition = {1. ed. española.},
	note = {Translation of: Logic and set theory.}
}