00730nam0-22002531i-450-990003932370403321000393237FED01000393237(Aleph)000393237FED0100039323720021118d1998----km-y0itay50------baengUSGeneral Purpose Technologies and Economic GrowthElhanan HelpmanCambridgeThe MIT Press1998315 pg.23 cmHelpman,Elhanan<1946- >128673ITUNINARICAUNIMARCBK990003932370403321O01.668824DECTSDECTSGeneral Purpose Technologies and Economic Growth511647UNINA