El Desarrollo De Las Comunicaciones

Year Published: 1955

Creator: Encyclopedia Britannica Films

Format: 16mm

Sound: sound

Description: A Spanish language film. Shows man's efforts to communicate--devices that have been invented to improve communication, and their effects on the social, cultural and economic life of the people. The battery, ground connections, electromagnet, telephone, telegraphy, cable, wireless, radio and television are illustrated.

No holdings listed.

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