@book{43815,
	author = {Lefebvre, Henri and Benítez Eiroa, Esther},
	title = {Lógica formal, lógica dialéctica / },
	publisher = {Siglo XXI Editores , },
	year = {1976.},
	series = {Teoría y crítica.},
	address = {México : },
	edition = {6a. ed.},
	note = {Incluye índice.}
}