@book{104951,
	author = {González del Valle, Luis and González del Valle Ríos, Antolín.},
	title = {Correspondencia comercial, fondo y forma},
	publisher = {South-Western Pub.},
	year = {c1981.},
	address = {Cincinnati},
	edition = {2a ed. rev.},
	note = {"V 30."}
}