ABC of the telephone : A pratical and useful treatise for students and workers in telephony, giving a review of the development of the industry to the present date, and full description of numerous valuable inventions and appliances, together with very many illustrations, diagrams and tables / James E. Homans
Princípios de telecomunicações / Jair cândido de Melo
Livro elementar de telegraphia electrica / Jorge da Cunha
Mieux utiliser le téléphone : un média sur votre bureau / Sophie de Menthon; pref. Marshall McLuhan