@book{91476,
	author = {Lefebvre, Henri, and Benítez Eiroa, Ma. Esther,},
	title = {Lógica formal, lógica dialéctica /},
	publisher = {Siglo XXI de España,},
	year = {1970.},
	series = {Teoría y crítica},
	address = {Madrid :},
	edition = {3a ed.},
	note = {Traducido de : Logique formelle, logique dialectique.}
}