In 1950, three influential books were published: Donald Keyhoe's 'The Flying Saucers Are Real', Frank Scully's 'Behind the Flying Saucers', and Gerald Heard's 'The Riddle of the Flying Saucers'.

Authors

• Person: Not available Organization: Wikipedia
  Unidentified flying object - Wikipedia

Sources

• Unidentified flying object - Wikipedia en.wikipedia.org Wikipedia via serper

Referenced by nodes (1)

• Donald Keyhoe entity