00311nam a2200097Ia 4500008004100000040003800041100002700079245005200106260004200158300001300200220119s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aLoubser, Jan J.&others 0aExploration in general theory in social science  bNew YorkaMacmillan Publicationc1976  a909xv p.