01017nam--2200361---450099000079798020331620050711183459.00-231-06368-70079798USA010079798(ALEPH)000079798USA01007979820011210d19901938km-y0ENGy0103----baengUSEssays on self-referenceNiklas LuhmannNew YorkColumbia university pressc1990245 p.24 cm2001ComunicazioneAspetti sociali302.2LUHMANN,Niklas118733ITsalbcISBD990000797980203316II.5. 3419(XV B 636)141316 LMXV BBKUMAPATTY9020011210USA01105120020403USA011726PATRY9020040406USA011655COPAT69020050711USA011834Essays on self-reference207814UNISA