00281nam a2200109Ia 4500008004100000040003800041100001400079245002100093260003300114300001100147653001300158211217s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aEmery,F E 0aSystems thinking  bPenguin BooksaEnglandc1974  a398 p.  aPolitics