. "Giselher Mumm was a German journalist and author."@en . "1 letter"@en . . "WL3000/9/1/1010" . . . . . "Correspondence with Mumm, Giselher"@en . "This material has been digitised. Readers should book a reading room terminal to access it."@en . . "An enquiry by Mumm for documentation of his persecution by the Gestapo during the Nazi era."@en . . .