@book{36776,
	author = {Holloway, G.E.T. and Bignami, Ariel,},
	title = {Concepcion del espacio en el niño segun Piaget /},
	publisher = {Buenos Aires,},
	year = {1982.},
	series = {Paidos educador ;},
	address = {Barcelona :},
	note = {Titulo original: An introduction to the childs conception of space.}
}