00813nam0-22002891i-450-99000681757040332120001010000681757FED01000681757(Aleph)000681757FED0100068175720001010d--------km-y0itay50------baitay-------001yyExploring the black boxtechnology, economics, and historyNathan Rosenberg.CambridgeCambridge University Pressc 1994.274 p.23 cm609.73Rosenberg,Nathan<1927- >10455ITUNINARICAUNIMARCBK990006817570403321VI A 137125961FSPBCFSPBCExploring the black box52068UNINAGEN01