00274nam a2200121Ia 4500008004100000041000800041100001900049245002200068260002700090300000800117365000800125999001900133231011s9999    xx            000 0 und d  aeng  aEdward de Bono  aSix Thinking Hats  bPengnin Books. -c2011  a177  b280  c895943d895943