found: Erlebtes, Erlittenes, c2007:t.p. (Marc Schoentgen)
found: Schoentgen. Vun der Rief zum Wäin, 2011:page 4 of cover (Marc Schoentgen, born in Luxemburg in 1969. Lives in Schengen. Police officer, photographer, author and editor)
found: Arbeiten unter Hitler, 2021:title page (Marc Schoentgen) back cover (studied in Tübingen. Doctorate, Universität Leipzig. Educator and historian of WWII)
found: EUROCLIO web site, 26 Sept. 2007(Marc Schoentgen, Association Luxembourgeoise des Enseignants d'Histoire)