"Dr Mark Wischnitzer (1882-1955) was a U.S. American historian of Jewish-Russian descent. From 1921-38 he had served as director of the welfare organisation Hilfsverein der Deutschen Juden."@en . "WL3000/9/1/1559" . "Correspondence with Wischnitzer, Mark"@en . . . "16 items"@en . . . "This material has been digitised. Readers should book a reading room terminal to access it."@en . . "The correspondence includes the exchange of published material, an information request by Wischnitzer on a certain individual, and, following his passing, a letter of condolence to his widow."@en . . . . .