30 January 1968: Oshawa Transmitting Station (II)

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Fixed Communications - Hydra Telegraph Relay System - Relocation of Hydra - Plans and Policy, RG24, S-2723-2, Vol. 2, Library and Archives Canada (LAC)

1966-1971: Heads and Tails: The End of HYDRA?
30 January 1968: Oshawa Transmitting Station (II)