00386nam a2200145Ia 4500008004100000020001500041082001700056100002300073245003600096260004600132300000800178650001600186650001400202653002400216170901s1961    xx            000 0 und d  a0471003301  a001.64bA18P  aAckoff, Russell L. 0aProgress in Operations Research  aNew YorkbJohn Wiley and Sons, Inc.c1961  a505  aGneralities  aKnowledge  aOperations research