Columbia subject headings:
Harvard subject headings:
Gestalt psychology.
Koffka, Kurt, 1886-
Koffka, Kurt, 1886-1941.
Lewin, Kurt, 1890-
Lewin, Kurt, 1890-1947.
Memory
Princeton subject headings:
Gestalt psychology.
Koffka, Kurt, 1886-1941.
Lewis, Kurt, 1890-1947.
Memory.