@book{13942,
	author = {Deaño Gamallo, Alfredo.},
	title = {Introducción a la lógica formal},
	publisher = {Alianza},
	year = {1978.},
	series = {Alianza Universidad Textos},
	address = {Madrid},
	edition = {1. ed. en Alianza universidad, Textos.}
}