"Correspondence with Kahn, Ludwig"@en . "This material has been digitised. Readers should book a reading room terminal to access it."@en . . . . "An enquiry for certain information about The Wiener Library's catalogue on German Jewry."@en . . "2 letters"@en . "Ludwig David Kahn was a Swiss accountant and manager."@en . . . . . "WL3000/9/1/731" . .