00573nam a2200217Ia 4500003000400000005001700004008004100021020001500062040001800077041000800095082002100103100002100124245004400145250001200189260005000201300002600251650002300277651001800300651001900318651001800337OSt20231006150529.0210716s1999    xx            000 0 und d  a0316178314  cAIMIT LIBRARY  aeng  a374.22 21bBONE  aBono, Edward De.  aSix thinking hats /cBy Edward De Bono.  a1st ed.  aNew York :bLittle Brown and Company ,c1999.  axiii,173p. ;b20.7 cm  aGeneral Management  aThe black hat  aThe yellow hat  aThe green hat