@book{14,
	author = {González, Raúl A. and Höhn, Guilermo E.},
	title = {Ciencias Naturales 8 :},
	publisher = {Puerto de Palos,},
	year = {2001.},
	address = {Buenos Aires :},
	edition = {1ª ed.},
	note = {Ciencias Naturales para 8 año.}
}