@book{14492,
	author = {Erdos, Renée F.},
	title = {La enseñanza por correspondencia},
	publisher = {Ediciones CEAC},
	year = {1976.},
	series = {Coleccion Educacion y Ensenaza Serie :Ensenanza a distancia},
	address = {Barcelona},
	edition = {2. ed.},
	note = {Translation of Establishing an institution teaching by correspondence.}
}