00259nam a2200109Ia 4500082002100000100001900021245004500040260004100085300001300126500000500139700000500144  a303.483bH591.TG  aHetzler, S. A.  aTechnological growth and social changeb  aLondonbRoutledge & Kegan Paulc1969  ax, 302p.  a  a