@book{720,
	author = {Arnolds, Alfonso},
	title = {Geografía Politica y económica de la Republica Argentina.},
	publisher = {Kapelusz, },
	year = {1963.},
	series = {Colec. universitaria .Serie:Geografía.},
	address = {Buenos Aires : },
	edition = {3ra.ed.},
	note = {Bibliografía p. 503-505.}
}