@book{172920,
	author = {Caldwell, Taylor and Obregón, Enrique de, tr.},
	title = {La columna de hierro : Cicerón y el esplendor del imperio romano  /},
	publisher = { Océano  :,},
	year = {1965},
	address = {España  :},
	note = {Título original: A pillar of iron}
}