00330nam a2200121Ia 4500008004100000041000800041082001700049100002600066245004500092260004700137300001300184365001100197240624s9999    xx            000 0 und d  aeng  a658.4063 CHR  aCHRISTENSEN CLAYTON M  aINNOVATOTOR S DILEMMA WHEN NEW TECHNOLOG  c1997aBostonbHarvard Business Press Books  a225 : p.  cRSb28