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Improvements in apparatus employed in wireless telegraphy (1899)
Marconi, Guglielmo, marchese, 1874-1937, Marconi's Wireless Telegraph Company, Great Britain. Patent Office, Malby & Sons, lithographer, Burndy Library, donor. DSI · Redhill : Printed for Her Majesty's Stationery Office, by Malcomson & Co., Ltd. · leaf 13
(1 sseet) … MaJby&Sons. Pkoto-btho.Telegraph, Wireless
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
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