"Correspondence regarding enquiries by Ruge for source material for a study on Neuengamme cocnentration camp."@en . "Correspondence with Ruge, Morten"@en . "Dr Morton Ruge was a Danish librarian and survivor of Neuengamme concentration camp."@en . . "10 letters"@en . "WL3000/9/1/1181" . . . . . . "This material has been digitised. Readers should book a reading room terminal to access it."@en . . . .