@book{17373,
	author = {Izquierdo Asensi, Fernando},
	title = {Geometría descriptiva},
	publisher = {Editorial Paraninfo},
	year = {1993},
	address = {Madrid},
	edition = {21 ed. ampl.},
	url = {https://chirinossilvaroger.files.wordpress.com/2012/04/geometra-descriptiva-por-fernando-izquierdo-asensi-24ta-edicicc3b3n.pdf}
}