00000cam a22000004a 4500 UP-99796217608403502 Buklod 20080519114925.0 a r |||| u| ta 080519s1999 mau r |000 0|eng d 0316178314 (pbk.) (iLib)UPD-00024689463 DLC DEDUC eng BF 441 D43 1999 De Bono, Edward 1933- Six thinking hats Edward de Bono. Rev. and updated ed. Boston Back Bay Books c1999. xiii, 173 p. Thought and thinking. FO Monograph UPD DEDUC BF 441 D43 1999 Book