Darwin, Charles. On the Origin of Species by Means of Natural Selection, or, the Preservation of Favoured Races in the Struggle for Life. London: John Murray, 1859.
From the Tracy W. McGregor Library of American History.
Entartete "Kunst" Ausstellungsführer. [Redding, Conn.: Silver Fox Press, 1972] Facsimile. Originally published: Berlin: Verlag für Kultur- und Wirtschaftswerbung, 1936.