@book{103837,
	author = {Hatcher Childress, David},
	title = {El enigma de los olmecas y las calaveras de cristal},
	publisher = {Ediciones Nowtilus, },
	year = {[Fecha de publicación no identificada]},
	address = {[Madrid, España] :},
	url = {https://public.digitaliapublishing.com/a/84459}
}