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 .