00317nam a2200097Ia 4500008004100000100004600041245009300087260001400180260001700194300000800211201214s9999    xx            000 0 und d  aLevitan, S. A. and Mangumgl, Marshall Ray 0aEmployment and Training In  The American Economy : Human Resources and Labour Markets  .  aCambridge  bHarper & Row  a551