Prof. Graham BELL, "On Methods of Preparing Selenium and other Substances for Photophonic Experiments",
Proceedings of the
Royal Society of London, Nov. 25 1880, p.72.
Histoire de la télévision - Articles, biographies, vidéos, documents, agenda, ressources, bibliographie
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Histoire de la télévision - Articles, biographies, vidéos, documents, agenda, ressources, bibliographie
Prof. Graham BELL, "On Methods of Preparing Selenium and other Substances for Photophonic Experiments",