00319nam a2200133Ia 450000500170000008000190001710000210003624500210005726000500007830000100012858300170013894200130015599900170016820260716043754.0  a05.03.04 L9171  aLowenthal, David  aSocial structure  bDevelopment Education CentreaTorontoCAc1974  a30 p.  c2/2/07kJOYD  cMmL9171  c53952d53952