Valdemar Poulsen (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Valdemar Poulsen" in English language version.

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8hathitrust.org

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1doodles.google

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adobe.com

stock.adobe.com

"Postage stamp Denmark 1969 Valdemar Poulsen, Engineer" by laufer.

archive.org

Thompson, J. Michael T. (2001). Visions of the Future: Physics and Electronics. Cambridge University Press. p. 140. ISBN 978-0-521-80538-4.
"The Poulsen 'Wireless'". The Graphic. January 12, 1907. p. 62. Retrieved 11 September 2015.

atv.dk

Knudsen, Henrik (2012). VISIONER, VIDEN OG VÆRDISKABELSE – EN HISTORIE OM AKADEMIET FOR DE TEKNISKE VIDENSKABER [VISIONS, KNOWLEDGE AND VALUE CREATION - A HISTORY OF ACADEMY OF ENGINEERING SCIENCES] (PDF) (in Danish). p. 130. ISBN 978-87-7836-063-2.

doodles.google

Valdemar Poulsen's 149th Birthday

gutenberg.org

Williams, Archibald (1904). The Romance of Modern Invention (3 ed.). Philadelphia; London: J. B. Lippinscott Company; C. Arthur Pearson, Ltd. Retrieved 20 October 2023.

hathitrust.org

babel.hathitrust.org

"Wireless Telephony", Electrical World, December 8, 1906, page 1121.
Amateur Radio by Maurice J. Grainger, 1922, page 87.
Denmark and the Danes by William J. Harvey and Christian Reppien, 1915, pages 233-239.
"Recording Telephones", Nature, August 16, 1900, pages 371-373.
"Notes From the Continent of Europe: The Use of the Telegraphone in Telephony" by Dr. Alfred Gradenwitz, Telephone Magazine, May 1904, pages 183-184.
"The Telegraphone" by A. F. Collins, Cyclopedia of Applied Electricity, 1909, pages 429-444.
"Wireless Course in Twenty Lessons" by H. W. Secor, S. Gernsback and A. Lescarboura, 1912, pages 54-56.
"The Federal Telegraph Co. of California and the Poulsen Arc Transmitter", History of Communications-electronics in the United States by Captain L. S. Howeth, 1963, pages 142-147.

infostory.com

"First Broadcast by Ham Radio Operator". 18 March 2013.

lex.dk

biografiskleksikon.lex.dk

"Johan E. Nyrop". 18 July 2011.

loc.gov

chroniclingamerica.loc.gov

"Music By Wireless Telephone", New-York Daily Tribune, March 7, 1907, page 4.
"Valdemar Poulsen Dies; Noted Danish Inventor", (Washington, D.C.) Evening Star, August 7, 1942, page B-4.

reventlow.dk

"Valdemar Poulsen" (genealogy)