@book{37326,
	author = {Lovell, K.},
	title = {Desarrollo de los conceptos basicos matemáticos y cientificos en los niños /},
	publisher = {Morata,},
	year = {1996.},
	address = {Madrid :},
	edition = {6a ed.},
	note = {Titulo original: The growth of basic mathematical and scientific concepts in children.}
}