00336nam a2200121Ia 4500008004100000082001900041100002100060245003600081250000600117260003100123300000600154650005400160150614s9999    xx            000 0 und d  a658.421  DRU-I  aPETER F, DRUCKER  aINNOVATION AND ENTREPRENEURSHIP  a1  bHarper Collins Pubrsc1985  a0  aINNOVATION AND ENTREPRENEURSHIP   PETER F DRUCKER