Title: The observation of human systems
Subjects: Psychology, Research, Baldwin, james, 1924-1987, Lewin, kurt, 1890-1947, Psychology, research, Psychologie, Recherche
People: L. S. Vygotskiĭ (1896-1934), James Baldwin (1924-1987), Kurt Lewin (1890-1947), James Jerome Gibson (1904-1980)