Facilities for telephones in new buildings : for the use of architects, surveyors, engineers and builders / General Post Office
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
Sistemas de comunicação / B. P. Lathi; trad. Lucia Maria Pantoja Junqueira, Leila Marize Fernandes; rev.Yuzo Yano
Livro elementar de telegraphia electrica / Jorge da Cunha