00503nam a2200145Ia 4500020001800000082001600018100002300034245012300057260004400180300001200224504005000236650003300286650001900319700001900338  a0-202-30798-0  a302.3 ACK-O  aAckoff, Russell L. 0aOn purposeful systems:an interdisciplinary analysis of individual and social behavior as a system of purposeful events  aNew BrunswickbAldine Transactionc2006  axv, 288  aincludes bibliographical references and index  aSocial sciencesvMethodology  aSocial systems  aEmery, Fred E.