@book{4577,
	author = {Copi, Irving M. },
	title = {Introduccion a la logica / },
	publisher = {EUDEBA, },
	year = {1983},
	address = {Buenos Aires : },
	edition = {25 ed.},
	note = {(25 ed. de la 4a. ed. ing) Traduccion de "introduction to logic"}
}