![Sociologist Johannes Schmidt inspects Niklas Luhmann's slip box at the university in Bielefeld, Germany, 29 June 2011. Until recently, Luhmann's legendary slip box was off-limits for scientists and scholars. 13 years after Sociologist Johannes Schmidt inspects Niklas Luhmann's slip box at the university in Bielefeld, Germany, 29 June 2011. Until recently, Luhmann's legendary slip box was off-limits for scientists and scholars. 13 years after](https://c8.alamy.com/comp/DAMXF6/sociologist-johannes-schmidt-inspects-niklas-luhmanns-slip-box-at-DAMXF6.jpg)
Sociologist Johannes Schmidt inspects Niklas Luhmann's slip box at the university in Bielefeld, Germany, 29 June 2011. Until recently, Luhmann's legendary slip box was off-limits for scientists and scholars. 13 years after
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Amazon.com: Packing Slip Envelope Pouches By PackageZoom 100-Pack- Clear Self Adhesive Shipping Label Sleeves With “PACKING LIST ENCLOSED” Print- Waterproof Top Loading Invoice/Packing List Pockets- 4.5”x 5.5” : Office Products
![Dr Raul Pacheco-Vega on X: "Somebody (I can't honestly recall whom) recommended “How to Take Smart Notes” to me. I purchased it and read it this morning. Ahrens basically summarizes Niklas Luhmann's Dr Raul Pacheco-Vega on X: "Somebody (I can't honestly recall whom) recommended “How to Take Smart Notes” to me. I purchased it and read it this morning. Ahrens basically summarizes Niklas Luhmann's](https://pbs.twimg.com/media/DtLh2uUVYAAmcIV.jpg)