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Pepall, Diana. Canada’s Bletchley Park: The Examination Unit in Ottawa’s Sandy Hill 1941–1945 (Revised Edition). https://www.historicalsocietyottawa.ca/publications/bytown-pamphlets/pamphlets-available-for-download/100-canada-s-bletchley-park-the-examination-unit-in-ottawa-s-sandy-hill-1941-1945.

Robinson, G. de B. (ed.) A History of the Examination Unit, 1941-1945. July 1945. [Unpublished internal history. A copy of this history is available in: LAC RG24 Vol. 29166 File WWII-31]

Syrett, David. “The Infrastructure of Communications Intelligence: The Allied D/F Network and the Battle of the Atlantic.” Intelligence and National Security 17, no. 3 (2002): 163-72. https://doi.org/10.1080/02684520412331306590.

Wark, Wesley. “Cryptographic Innocence: The Origins of Signals Intelligence in Canada in the Second World War.” Journal of Contemporary History 22, no. 4 (1987): 639–65. https://doi.org/10.1177/002200948702200405.

Further Reading