http://www.museecommunication.org/Electrom/Morse.html

http://www.museecommunication.org/Cros.html

http://www.museecommunication.org/CamilleBiraud.html

http://www.museecommunication.org/Marconi.html

http://www.museecommunication.org/Ducretet1898-1998.html

http://www.museecommunication.org/Electrom/TSF.html

http://perso.wanadoo.fr/laurent.duriez/tel-elect.htm