@book{70542,
	author = {Hemmings, Ray.},
	title = {Cincuenta años de libertad :},
	publisher = {Alinza Editorial,},
	year = {1975.},
	series = {Alianza Universidad;},
	address = {Madrid :},
	note = {Translation of Fifty years of freedom: a study of the development of the ideas of A.S. Neill.}
}