@book{69338,
	author = {Alcega, Juan de and Drouy, Guillermo},
	title = {[Libro de geometria, practica y traça : },
	publisher = {Biblioteca Nacional de España,},
	year = {1993},
	address = {Madrid :},
	note = {Signatura: A±10÷, B-F±8÷, G-H±4÷, K-L±8÷, M-N±4÷, O±8÷, P±10÷},
	url = {http://bdh-rd.bne.es/viewer.vm?id=0000022768&page=1}
}