@book{101990,
	author = {Kühn, Herbert},
	title = {El desarrollo de la humanidad},
	publisher = {Compaĩ́a General Fabril Editora},
	year = {c1964.},
	series = {Colección Experiencia},
	address = {Buenos Aires},
	note = {Translation of : Die Entfaltung der Menschheit.}
}