Increase of automobile traffic has made it necessary to install pay phones along main roads open to public day and night, even when exchange is closed; wiring diagrams and illustrations of equipment of various types for different routes. (partly on supp. plate)
Installation of public telephones on national roads
L'installation de postes telephoniques publics sur les routes nationales
Annales des Postes Telegraphes et Telephones ; 20 , n 5
1931
14 pages
13 Figs.
Aufsatz (Zeitschrift)
Französisch
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The installation and protection of telephones for electric railway service
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