IEEE Global History Network: Carbon Transmitter. New Brunswick, NJ: IEEE History Center Carbon Transmitter. Arkivita el la originalo je M18a de marto, 2010. Alirita 14a de januaro, 2009.
Thomas Edison's Vision. United States Navy. Alirita 18a de decembro 2013. “Secretary of the Navy Josephus Daniels seized the opportunity created by Edison's public comments to enlist Edison's support. He agreed to serve as the head of a new body of civilian experts – the Naval Consulting Board – to advise the Navy on science and technology.”.
IEEE Global History Network: Carbon Transmitter. New Brunswick, NJ: IEEE History Center Carbon Transmitter. Arkivita el la originalo je M18a de marto, 2010. Alirita 14a de januaro, 2009.