BIBLIOGRAFIA

(Rollo, 1936):
Applayard ROLLO, Pioneers of Electrical Communication, London, MacMillan&Company, 1936

(Standage, 1986):
Tom STANDAGE, The Victorian internet: The Remarkable Story of Telegraph and The Ninenteenth Century's, New York, Walker Published Company, 1986

(Huuderman, 2003):
Antony A. HUUDERMAN, The Worldwide History of Telecommunication, New Jersey, John Wiley & Sons, 2003

(Belloc, 1894):
Alexis BELLOC, La télégraphie historique depuis les temps le plus reculés jusqu’à nos jours, Paris, 1894

(Jipp, 1934):
August JIPP, Moderne Telegraphie, Berlin, Springer-Verlag Berlin Heidelberg, 1934