G. G. Winkel, "Corpsgeschichte der Bonner Borussia"
1938, written by the Secret Government Councillor G. G. Winkel, Franconiae, Masoviae, Rhaetiae, Sueviae Prague, Franconiae and Marchiae Brünn, Borussiae Bonn, edited by Arved Baron von Hahn, Frontispiece Kaiser Wilhelm II, in colour of Bonn Prussia, handwritten dedication to the fencing teacher Günter Rupp in Bonn, as a thank you for many fencing lessons/bouts (Paukstunden), dated WS 1980/81, with the signatures of Bogislav v. Zitzewitz Borussiae (F.M.) x, Christoph Eichhorn Borussiae xx, Stefan Fhr. v. Friesen Borussiae F, Rolf Roosen Borussiae F, Georg Prinz zur Lippe F.M., Hendrik R. Meyer-Dienes Borussiae F, age-appropriate condition, individual pages as well as the book block loose, not collated, 196 pages, self-published by Borussia