@book{ Solr-025053272, title = {Beobachtungen der Moderne}, author = {Luhmann, Niklas}, address = {Opladen}, publisher = {Westdt. Verlag}, year = {1992}, note = {Literaturangaben}, url = {http://www.gbv.de/dms/hebis-darmstadt/toc/19885296.pdf} url = {https://swbplus.bsz-bw.de/bsz027640485cov.jpg} }