The nature of creative activity, experimental and comparative studie s of visual and non-visual sources of drawing, painting, and sculpture by means of the artistic products of weak sighted and blind subjects an d of the art of different epochs and cultures /
V. Lowenfeld and O.A . Oeser.
- New York : Harcourt, Brace and Company, 1939.
- xvii, 272 p. : ill., plates, diagr. col. plates ; 22 cm.