@book{148614,
	author = {Echave, Delia Teresa},
	title = {Logica, proposicion y norma.},
	publisher = {Astrea},
	year = {1995.},
	series = {Colección Filosofía y Derecho ; v. 9.},
	address = {Buenos Aires},
	edition = {4a reimpresion.}
}