00335nam a2200133Ia 4500008004100000082001400041100002100055245001700076260004600093300000800139650001400147650002000161653002000181170901s1969    xx            000 0 und d  a331bP39L  aPerlman, Richard 0aLabor Theory  aNew YorkbJohn Wiley And Sons, Inc.c1969  a237  aEconomics  aSocial sciences  aLabor economics