@book{53991,
	author = {Gierke, Otto von, and Irazusta, Julio},
	title = {Teorías políticas de la Edad Media /},
	publisher = {Editorial  Huemul,},
	year = {1963.},
	address = {Buenos Aires, Argentina :},
	note = {Traducido del idioma original: Political theories of the Middle Age}
}