@book{123940,
	author = {Ramírez Vázquez, José. and Sánchez Martín, Rafael.},
	title = {Instalaciones de baja tensión },
	publisher = {Ceac, },
	year = {1977.},
	series = {Enciclopedia Ceac de electricidad},
	address = {Barcelona : },
	edition = {2ª ed.}
}