"téléphone." . . "Telefon." . . "Bell, Alexander Graham." . . "Erfindung." . . "Brantford (Ont.)" . . "Bell, Alexander." . . . . "The chord of steel : the story of the invention of the telephone = Alexander Graham Bell - der Erfinder des Telephons" . "Chord of steel"@en . . . . . . . . . . . . . . . "History"@en . "The Chord of Steel (Alexander G. Bell)"@en . . . "The chord of steel the story of the invention of the telephone"@en . . "This is the story of the Bell family, from their arrival in Brantford, Ontario, to the time when Alexander successfully demostrated the telephone."@en . . . . . "The Chord of steel" . "Alexander Graham Bell - der Erfinder des Telephons" . "The chord of steel; the invention of the telephone"@en . . . . . . "The chord of steel" . . "The chord of steel"@en . . . . "Alexander Graham Bell's family background and events which led to the invention of the telephone."@en . . "The chord of steel : the story of the invention of the telephone"@en . "The chord of steel : the story of the invention of the telephone" .