000 00305nam a22000977a 4500
008 150819b xxu||||| |||| 00| 0 eng d
082 _a155.4 LEW
100 _aLEWIN, KURT.
245 _aTHE CONCEPTUAL REPRESENTATATION AND THE MEASUREMENT OF PSYCHOLOGICAL FORCES
260 _aNEW YORK
_bDUKE UNIVERSITY PRESS
_c1938
999 _c171
_d171