00433nam a2200169Ia 4500 170901s1961 xx 000 0 und d 0471003301 001.64 A18P Ackoff, Russell L. Progress in Operations Research New York John Wiley and Sons, Inc. 1961 505 Gneralities Knowledge Operations research ddc BK 58 58 0 0 ddc 0 0 RAU RAU 2017-10-18 1 0 001.64 A18P 15006 2017-10-18 1978-03-16 BK