00407nam a2200145Ia 4500008004100000020001500041041000800056082001600064100002200080245008800102250000600190260004400196300001200240650000900252210716s1985    xx            000 0 und d  a0060154284  aeng  a338.04 DRUP  aDrucker, Peter F.  aInnovation and entrepreneurship: practice and principles.bPractice and principles.  a1  aLondonbHarper and Row publishersc1985  avii,277  aNone