CDVN00005
Defence Research Board [Joint Intelligence Bureau] to CANRESEARCH London [from McGibbon to Trotman, JIB Liaison Officer in London] DRB 1934.
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Library and Archives Canada, RG24, vol. 31274, file 173-2000-1, part 8.
Defence Research Board [Joint Intelligence Bureau] to CANRESEARCH London [from McGibbon to Trotman, JIB Liaison Officer in London] DRB 1934.
Library and Archives Canada, RG24, vol. 31274, file 173-2000-1, part 8.