01024nam a2200289 i 450099100140065970753620020507125401.0991215s1990 us ||| | eng 0231063687b10215426-39ule_instLE02985240ExLISUFI - Sett. Diritti e Politiche Euromediterraneeita302Luhmann, Niklas118733Essays on self-reference /Niklas LuhmannNew York :Columbia University Press,c1990245 p. ;24 cm.Includes bibliographical referencesCommunicazioneAspetti socialiInterazione socialeSistemi sociali.b1021542604-10-0627-06-02991001400659707536LE029 302 LUH01.0112029000010657le029-E0.00-no 01010.i1026421827-06-02Essays on self-reference207814UNISALENTOle02901-01-99ma -engus 01