TY - JOUR A1 - Maccoby, Michael T1 - Productivity and Human Development. The Bolivar Project T2 - The Washington Post (May, 20, 1978). Y1 - 1978 UR - https://opus4.kobv.de/opus4-Fromm/frontdoor/index/index/docId/15359 N1 - Xeroxcopy ER -