Marconi Transmitted The First Radio Signal, But His Invention Is Not Uncontested - Zenger News
Guglielmo Marconi - Wikipedia
Guglielmo Marconi demonstrating apparatus he used in his first long distance radio transmissions in the 1890, / Guglielmo Marconi demonstrierte Apparate, die er 1890 in seinen ersten FernfunkĂĽbertragungen verwendete , Historisch, digital
World Radio Day: Guglielmo Marconi's Irish connection