00800nam0-22002891i-450-990003730160403321200010100-521-45955-9000373016FED01000373016(Aleph)000373016FED0100037301620000920d1994----km-y0itay50------baitay-------001yyExploring the black boxTechnology, economics, and historyN. RosenbergU.K.Cambridge University Press1994274 p.22cmRosenberg,Nathan<1927- >10455ITUNINARICAUNIMARCBK99000373016040332103.16162DECTSDECTSExploring the black box52068UNINAING01