Télégraphie et téléphonie sans fil / M. Veaux
Instruction sur le service téléphonique / Ministère des Travaux Publics des Postes et des Télégraphes
These and other things were done : The war story of standard telephones and cables limited / Douglas Reekie
Moe's Principle an econometric investigation intended as an aid in dimensioning and managing telephone plant : Theory and tables / Arne Jensen
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