. "HAHN, Professor Dr Otto (1879-1968)"@eng . . "1 file"@eng . "1 file"@eng . . . "HAHN, Professor Dr Otto (1879-1968)"@eng . . "Typescript text in German entitled 'Beziehungen zu Nichtariern' ('Relationships with non-Aryans'), dated Jul 1945, relating to the treatment of Hahn's Jewish friends and colleagues in Germany, 1933-1945."@eng .