"Correspondence regarding an enquiry by Barret & Beller for material on the procedure of political trials in Nazi Germany or the Soviet Union."@en . . . . . . "WL3000/9/1/110" . "Barrett & Beller was a US-American law firm."@en . . . "This material has been digitised. Readers should book a reading room terminal to access it."@en . "4 letters"@en . . . "Correspondence with Barret and Beller"@en .