Telecommunications / Catherine Bertho Lavenir; pref. Pekka Tarjanne, foto ed. Mathieu Barrois
Notes on telegraphy : a simple exposition of the rudiments of technical telegraphy and telephony / A. G. Pratt, G. Mogg
Telephone : the first hundred years / John Brooks
International Telecommunications / Osborne Mance; assistido por J.E. Wheeler