Lee De Forest and the Fatherhood of Radio: Hijiya, James A.: 9781611460216: Amazon.com: Books
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Lee de Forest - Wikipedia
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De Forest model RJ-4.Audion radio receiver | National Museum of American History
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DEFOREST RADIO D10 TUBE 1920 ANTIQUE VINTAGE SET DE FOREST PRE-1930 COLLECTIBLE | eBay
The 'Audion Piano' and Audio Oscillator. Lee De Forest. USA, 1915 – 120 Years of Electronic Music
Lee de Forest | American Inventor & Radio Pioneer | Britannica
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Lee De Forest - Engineering and Technology History Wiki
Lee de Forest | American Inventor & Radio Pioneer | Britannica
Lee de Forest - Wikipedia
Lee de Forest.org
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Father of Radio - The First Edition Rare Books
