@book{109743,
	author = {Bernal, Antonio. and e-libro, Corp.},
	title = {Astronomía N  9̂2 - Febrero 2007},
	publisher = {Equipo Sirius,},
	year = {2007.},
	address = {[Madrid] :},
	url = {https://elibro.net/ereader/politecnicointernacional/25351}
}