00325    a2200109   4500020001500000082001700015100002000032245008100052260004000133300002100173650002100194  a3790816477  a338.064bHEM  aHempell, Thomas  aComputers and productivitybhow firms make a general purpose technology work  aGermanybPhysica verlagc2006g2006  ax, 194p.c23.5cm  aENTREPRENEURSHIP