00499nam a2200193Ia 4500 141004s9999 xx 000 0 und d a English 302.2 LUH/EC Niklas Luhmann ecological communication Niklas Luhmann polity press 1989 1A4 Complexity and evolution, Resonance, binary coding, Ecological knowledge BK 301920 301920 0 0 0 0 KAUCOF KAUCOF 0 302.2 LUH/EC KAU_COF-1021 2014-10-04 00:00:00 2014-10-04 BK