00277nam a2200121Ia 4500082001900000100001900019245002500038260002900063300001300092490004000105500000500145700000500150  a302.5bP251.CS  aParkman, Ralph  aCybernetic societyb  aNew YorkbPergamonc1972  ax, 396p.  aPergamon Unified Engineering series  a  a