Kräkel, Matthias 1:1

Links
- https://www.econ.uni-bonn.de/iame/media/econtribute-photos/kraekel_matthias_1-1.jpg/image_view_fullscreen
- https://www.econ.uni-bonn.de/iame/media/econtribute-photos/kraekel_matthias_1-1.jpg/@@download/image/Kraekel_Matthias_1-1.jpg