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Technology and American Radio, 1900-1932. Princeton University Press. ISBN 9781400854608. Retrieved August 11, 2019 – via Google Books. "Directorypatent.com...11 KB (1,464 words) - 09:45, 10 August 2024
American Radio, 1900-1932. Princeton University Press. p. 195. ISBN 978-1400854608. Fisher, David E.; Fisher, Marshall (1996). Tube: The Invention of Television...31 KB (3,670 words) - 15:18, 30 August 2024
Technology and American Radio, 1900-1932. Princeton Univ. Press. p. 53. ISBN 978-1400854608. Fessenden, R. A. (1908). "Wireless Telephony". Annual Report of the...23 KB (2,564 words) - 14:03, 26 June 2024
and American Radio, 1900-1932. Princeton Univ. Press. p. 190. ISBN 978-1400854608. Wikimedia Commons has media related to Coherers. Web archive backup:...27 KB (3,067 words) - 03:24, 26 August 2024
Radio, 1900-1932. Princeton University Press. pp. 4–7, 32–33. ISBN 978-1400854608. Phillips, Vivian J. (1980). Early Radio Wave Detectors. London: Inst...82 KB (8,410 words) - 05:48, 1 September 2024
and American Radio, 1900-1932. Princeton Univ. Press. p. 190. ISBN 978-1400854608. Worthington, George (January 18, 1913). "Frog's leg method of detecting...152 KB (16,598 words) - 17:26, 4 September 2024
Technology and American Radio, 1900-1932. Princeton University Press. ISBN 978-1400854608. Codella, Christopher F. (2016). "Spark Radio". Ham Radio History. C...123 KB (13,109 words) - 06:18, 7 September 2024
