the zettelkasten of niklas luhmann is currently being digitized. you can browse it online. zettelkasten II is the more interesting one. https://niklas-luhmann-

the zettelkasten of niklas luhmann is currently being digitized. you can browse it online. zettelkasten II is the more interesting one. https://niklas-luhmann-archiv.de/bestand/zettelkasten/inhaltsuebersicht https://niklas-luhmann-archiv.de/bestand/zettelkasten/inhalt...