"Correspondence regarding the exchange of publications as well as planned visits of the Zentralarchiv by Alfred Wiener."@en . . "The Deutsches Zentralarchiv, later Zentrales Staatsarchiv der DDR, was the federal archive of East Germany. Founded in 1946 in Potsdam, it was dissolved after the German reunification in 1990."@en . . . . "39 letters"@en . . . "Correspondence with Deutsches Zentralarchiv"@en . . "This material has been digitised. Readers should book a reading room terminal to access it."@en . . . "WL3000/9/1/330" .