00818nam0 2200241 450 00001798420081022101605.020081022d1950----km-y0itay50------baengUSa-------001yyCyberneticscircular causal and feedback mechanisms in biological and social systemstransactions of the 6th Conference, March 25-25, 1949, New York (N.Y.)edited by Heinz Von FoersterNew YorkJosiah Macy Jr. Foundation1950209 p.ill.24 cmCybernetics56625Cibernetica001.5319Foerster,Heinz : VonITUNIPARTHENOPE20081022RICAUNIMARC000017984001.53/10611742NAVA1Cybernetics56625UNIPARTHENOPE