Great Britain. War Office. Chiefs of Staff Committee.
Memoranda, 1939-1946.
Papers circulated to the Committee, including a separate operational and top secret series (O).
World War, 1939-1945 -- Military intelligence -- Great Britain.
Memorandums. aat
AIP-ICOS
Great Britain. National Archives. Kew, Richmond, Surrey, TW9 4DU, UK