Não informado. (1956). Point to point telecommunication. Marconi's Wireless Telegraph.
Chicago-viite (17. p.)Não informado. Point to Point Telecommunication. Chelmsford, Inglaterra: Marconi's Wireless Telegraph, 1956.
MLA-viite (8. p.)Não informado. Point to Point Telecommunication. Marconi's Wireless Telegraph, 1956.
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