Helmuth Scheel'den Aziz Ogan'a mektup - Helmuth Scheel, Akademie der Wissenschaften un der Literatur (My University, 1950)
Letter from Helmuth Scheel to Aziz Ogan
Felsefe Profesörü Erich Rothacker'in Istanbul ziyareti hakkında (2 kopya)
Keywords: Helmuth Scheel; Erich Rothacker; Aziz Ogan; Bonn; Istanbul; Ziyaret; Visit