. "Correspondence regarding Serge's plan to write about his experience at Oranienburg concentration camp and the use of according material. Contained are WL memos as well as a map of the Sachsenhausen."@en . "Correspondence with Serge, A."@en . . . . . "13 letters"@en . . . . . "A. Serge was a former prisoner at Oranienburg, a sub camp of Sachsenhausen concentration camp. After the war he lived in Canada."@en . "WL3000/9/1/1261" . "This material has been digitised. Readers should book a reading room terminal to access it."@en . .