@book{173463,
	author = {Pérez-Portabella, Francisco Javier. and Urquía Martínez, Begoña.},
	title = {Para la integración del deficiente},
	publisher = {Ciencias de la Educación Preescolar},
	year = {1981.},
	address = {Madrid},
	edition = {4. ed.}
}