[DND 709]
DND, External Affairs, USAF, teletype lines
Letter from Belanger, Director, Communications Branch, External Affairs to D Sigs, and attached correspondence with the Bell Telephone Company pertaining to conversion of DND circuit 709 to 100 wpm operations.
Hydra Communications - Policy, RG24, 1250-36 Vol. 1, Library and Archives Canada (LAC)
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