. "20 letters"@en . "This material has been digitised. Readers should book a reading room terminal to access it."@en . "Correspondence with Hupka, Herbert"@en . "Dr Herbert Hupka (1915-2006) was a German journalist, writer and politician."@en . . "WL3000/9/1/631" . . . "Correspondence regarding the mutual dispatch of books including material on the re-unification of Germany."@en . . . . . .