Robert Watson-Watt, the inventor of Radar in 1935 | History, Science and nature, American history
The History of Radar
The Invention Of Radar 1935 - Weird History Facts
How the search for a 'death ray' led to radar - BBC News
The History of Air Intercept Radar & the British Nightfighter 1935–1959: 1935-1959 - Kindle edition by White, Ian. Politics & Social Sciences Kindle eBooks @ Amazon.com.
Robert Watson-Watt And The Triumph Of Radar - Science Museum Blog