@book{6807,
	author = {Rey Balmaceda, Raúl and Echeverría, María Julia},
	title = {Naturaleza, sociedades y espacios geográficos},
	publisher = {A-Z},
	year = {1996},
	series = {Plata Hoy},
	address = {Buenos Aires},
	edition = {1a. ed.}
}