00711nam0-22002531i-450-99000265450040332120040315153526.0000265450FED01000265450(Aleph)000265450FED0100026545020030910d1976----km-y0itay50------baengWorld modelinga dialogueby West C. Churchman, R.O. MasonNew YorkNorth Holland1976Churchman,Charles West<1913- >2743Mason,R.O.370056ITUNINARICAUNIMARCBK99000265450040332112-8-66-TI4213ECAECAWorld modeling430562UNINA