@book{104357,
	author = {Letona, José María,},
	title = {Uno + uno son diez /},
	publisher = {Editorial La Muralla, S. A.,},
	year = {[2010]},
	series = {Colección Aula abierta},
	address = {Madrid :},
	url = {https://login.zproxy.cun.edu.co/login?url=https://www.digitaliapublishing.com/a/137269/}
}