Arrangement between the United States and Canada governing radio communications between private experimental stations
[49] The Canadian Minister (Massey) to the Secretary of State
Washington, 2 October, 1928.
811.7442 Amateur/1
[50] The Secretary of State to the Canadian Minister (Massey)
Washington, December 29, 1928.
811.7442 Amateur/24
[51] The Canadian Minister (Massey) to the Secretary of State
Washington, 12 January, 1929.
811.7442 Amateur/25