Have you looked at the original? Luhmann Original Zettelkasten was scannend and is online available. Though, it's all german. Tutorial: https://niklas-luhmann-

Have you looked at the original? Luhmann Original Zettelkasten was scannend and is online available. Though, it's all german. Tutorial: https://niklas-luhmann-archiv.de/bestand/zettelkasten/inhaltsuebersicht https://niklas-luhmann-archiv.de/bestand/zettelkasten/inhalt... Zettel 1: https://niklas-luhmann-archiv.de/bestand/zettelkasten/zettel/ZK_1_NB_1_1_V https://niklas-luhmann-archiv.de/bestand/zettelkasten/zettel...