Walter Kellogg Towers
Masters of space
Walter Kellogg Towers · 2004
ספרייה ציבורית, Project Gutenberg. בלי הרשמה.
TelephoneTelegraphRadioTelegraph, WirelessMarconi, Guglielmo, marchese, 1874-1937Carty, John J. (John Joseph), 1861-1932Kelvin, William Thomson, Baron, 1824-1907Bell, Alexander Graham, 1847-1922