Datei:Broschuere Wardenclyffe Turm .png

Quelle Wikimedia Commons: Image is from a publication made by Nikola Tesla promoting the of his Wardenclyffe site. Image published before the tower's demolition in 1917, therefore image is PD in the US. Author Nikola Tesla (d. 1943). Original from Lorax at en.wikipedia Permission(Reusing this file) PD-1923; PD-US. This work is in the public domain in the United States because it was registered with the U.S. Copyrights Office or published before January 1, 1923 Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.