Dallenbach, K. M. and Clark Trown et al. 1970. Psychologists 1927-1933. 20:17 min.
Dallenbach, Karl M., Milton Cotzin and Michael Supa. 1941. "Facial Vision" The Perception of Obstacles by the Blind. 11:58 min.
Lewin, Kurt and Marjorie R. Leonard. 1940, about. Level of Aspiration in Young Children. 10:54 min.
Lewin, Kurt. 1924, about. Walking Upstairs for the First Time. 03:56 min.
Lewin, Kurt. 1925, about. Field Forces as Impediments to a Performance. 09:04 min.
Max Planck Institute for the History of Science, Berlin