@book{103,
	author = {Peralta P., Norca Ligia and Cid, Henry,},
	title = {Ciencias naturales papelín 1 /},
	publisher = {SM,},
	year = {2006.},
	series = {Educación en valores},
	address = {Santo Domingo :},
	note = {Proyecto Mundo Abierto}
}