@book{132955,
	author = {Royo Villanova, Antonio, and Royo Villanova, Segismundo.},
	title = {Elementos de Derecho Administrativo / },
	editor = {Imp. Castellana)},
	publisher = {Santarén, },
	year = {1940 (},
	address = {Valladolid : },
	edition = {16ª  ed.}
}