00671nam0-22002411i-450-990002800700403321000280070FED01000280070(Aleph)000280070FED0100028007020000920d1968----km-y0itay50------baENG<<The >>economics of technological change.by Mansfield E.New YorkNorton1968.Mansfield,Edwin<1930- >1288ITUNINARICAUNIMARCBK9900028007004033210-7-22TIC 2828ECAECAEconomics of technological change46786UNINAING01