File:Frank Shannon in Flash Gordon Conquers the Universe (1940).jpg - Wikimedia Commons
Flash Gordon Conquers the Universe (1940) - IMDb
Flash Gordon Conquers the Universe (1940) – Chapters 1-6
Flash Gordon (2007 TV series) - Wikipedia
Flash Gordon Conquers The Universe – Signals – tape 932
The Flash Gordon Serials, 1936-1940: A Heavily Illustrated Guide: Kinnard, Roy, Crnkovich, Tony, Vitone, R.J.: 9780786466153: : Books
Flash Gordon (video game), Hey Kids Comics Wiki
Flash Gordon - Wikipedia
Flash Gordon (serial), Flash Gordon Wiki
Flash Gordon Conquers the Universe
Flash Gordon Conquers the Universe (1940) – Chapters 1-6
Flash Gordon Conquers the Universe (1940) - Cast & Crew — The Movie Database (TMDB)