TY - JOUR A1 - Lewin, K. T1 - Comments Concerning Psychological Forces and Energies, and the Structure of the Psyche JF - D. Rapaport (Ed.), Organization and Pathology of Thought. Selected Sources, New York and London (Columbia University Press) 1951, pp. 76-94. Y1 - 1951 ER - TY - JOUR A1 - Lewin, K. T1 - Intention, Will and Need JF - D. Rapaport (Ed.), Organization and Pathology of Thought. Selected Sources, New York and London (Columbia University Press) 1951, pp. 95-153. Y1 - 1951 ER -