00299nam a2200097Ia 450000500170000008000190001710000320003624500750006826000390014358300190018220260716043533.0  a19.01.05 D4571  aAckoff, Russell L. [et al.]  aDesigning a national scientific and technological communication system  bPennsylvaniaaPhiladelphiaUSc1976  c10/11/04kJOYD