TY - JOUR A1 - Yankelovich, D. T1 - Wer hat noch Lust zu arbeiten JF - Psychologie heute, Vol. 5 (No. 11, 1978), pp. 14-21. Y1 - 1978 ER - TY - BOOK A1 - Yankelovich, D. A1 - Barrett, W. T1 - Ego and instinct, New York (Random House) 1970. Y1 - 1970 N1 - Marks in the copy ER -