Am Alien
^Christopher Columbus UFO sighting in 1492. Retrieved on 2007-02-13.
^An observation in 1566. Retrieved on 2007-02-21.
^ abAstronomie Geschichte Vulkan. Retrieved on 2007-02-13.
^UFO Area UFO LANDINGS (1868-1968). Retrieved on 2007-02-13.
^Letter to Scientific American, Dec 18, 1886. Retrieved on 2007-02-13.
^Aurora Texas Crash. MUFON. Retrieved on 2007-04-02.
^http://www.paris-things-to-do.co.uk/paris-attraction-la-tour-eiffel-tower.html
^ Nicholas Roerich, Altai-Himalaya: A Travel Diary, pp. 361-62.
^Mötet i gläntan. Retrieved on 2007-02-13.
^Kenneth Arnold's (Pilot) Interview. Retrieved on 2007-02-13.
^1970s The UFO Papers. Retrieved on 2007-02-13.
^UFO with occupants encountered by former mayor in Hasselbach, Germany. Retrieved on 2007-02-13.
^ A.J.S. Rayl (April 1994). Inside the military UFO underground; three insiders describe a military underground awash in UFOs. Retrieved on 2007-07-04.
^UFOS at close sight: a brief history. Retrieved on 2007-05-30.
^Academic throws light on 40-year-old UFO mystery. Retrieved on 2007-02-13.
^Canada's Unidentified Flying Objects: The Search for the Unknown at Library and Archives Canada
^They saw 'strange lights in the sky'. Retrieved on 2007-02-23.
^ R. M. W. Musson, 2006. The enigmatic Bala earthquake of 1974, Astronomy & Geophysics, vol. 47 no 5, pp 11-15.
^THE JANOS PEOPLE. Retrieved on 2007-02-13.
^Obituary: Robert Taylor. Retrieved on 2007-03-29.
^Night Siege (ISBN 0-345-34213-5) by J. Allen Hynek
^Rendlesham Forest UFO Case. Retrieved on 2007-06-28.
^BreitBart.com: France opens secret UFO files covering 50 years
^INFA :: Casos Ufológicos :: A Noite Oficial dos OVNIs (Portuguese). Retrieved on 2007-02-13.
^UFO Evidence : JAL Flight 1628 Over Alaska. Retrieved on 2007-03-28.
^Best UFO Cases III: Belgium, 1989-1990. UFO Evidence. Retrieved on 2007-07-31.
^An aerial phenomenon over Montreal. Retrieved on 2007-02-13.
^ Bassior, Jean-Noel (November 2005). UFOs: What the Government Really Knows pp. 52. Hustler. Archived from the original on 2007-05-13. Retrieved on 2007-05-13.
^Greer, Steven (2006). "Gobsmacked!", Hidden Truth Forbidden Knowledge. USA: Cataloging-in-Publication (Quality Books, Inc.), 87-91. ISBN 978-0-96-732382-4.
^Greer, Steven (2006). "Truth Stranger than Fiction", Hidden Truth Forbidden Knowledge. USA: Cataloging-in-Publication (Quality Books, Inc.), 92-94. ISBN 978-0-96-732382-4.
^UFOs - Mexico City. Retrieved on 2007-02-13.
^Mexico City, August 6th, 1997. Retrieved on 2007-02-13.
^Another UFO Sighted Over Pakistan. Retrieved on 2007-02-22.
^ Smith, James C. (July 24, 2004). The Mexican Air Force UFO Affair: Aliens, Ball Lightning, or Flares?. Retrieved on 2007-05-13.
^National UFO Reporting Center - 2 Chevrons flying in perfect formation during lunar eclipse. Retrieved on 2007-02-13.
^ Frank, Thomas; Alan Levin (April 27, 2005). Radar alert sends Bush into White House bunker. USA2007-02-13. Today. Retrieved on
^Edward20.jpg. Retrieved on 2007-02-13.
^DSC00143.jpg. Retrieved on 2007-02-13.
^ Cielebiaś, Piotr; Robert Morningstar and Dirk Vander Ploeg (April 19, 2007). UFO Over Vatican. UFO Digest. Retrieved on 2007-04-19.
^ UFO. UFO China. Google Video.
^ Filer, George (September 6, 2006). "China UFO filmed" in Filer's Files #36. NationalUFOCenter. Retrieved on 2007-02-14.
^UFO Videotaped in China, August, 2006. UFO Casebook (August 2006). Retrieved on 2007-02-14.
^Ajax, Ontario, Canada Photograph Shows Unknown Flying Object. Retrieved on 2007-02-21.
^'UFO' spooks pilots over Chicago. Retrieved on 2007-02-13.
^Multiple witnesses observe disc-shaped object over Chicago O'Hare Airport. Retrieved on 2007-02-13.
^National UFO Reporting Center - Chicago OHare UFO Report. Retrieved on 2007-02-13.
^Flotilla of Triangle UFOs Seen Over Warsaw. Retrieved on 2007-02-14.
^Над Калининградом пролетел НЛО? (Russian). Retrieved on 2007-02-22.
^ Gautam, Vishwas (March 31, 2007). 'A ball of fire... what was that?. The Times of India. Retrieved on 2007-05-02.
^ Paljor, Karma (March 15, 2007). Were there UFOs over PM's house?. CNN IBN. Retrieved on 2007-04-01.
^UFO Sighting In Cleveland?. CBS News.
^ de Woolfson, Joel (April 26, 2007). Pilot’s UFO shock. This is Guernsey. Retrieved on 2007-04-26.
^ Thirkill, Stephen (May 17, 2007). Is this a UFO?. Mansfield Today. Retrieved on 2007-05-18.
^UFOs are frequent flyers in our area. BBC News (May 14, 2007). Retrieved on 2007-05-24.
^Residents spot strange UFO lights. BBC News (May 14, 2007). Retrieved on 2007-05-14.
^ Freeman, Robert (June 1, 2007). UFO ‘not from here,’ says local deejay. The Progress. Retrieved on 2007-06-15. Original
^Spotted: UFO in Bangalore airspace!. CNN IBN (May 30, 2007). Retrieved on 2007-05-30.
^UFO sightings bring town to a standstill. DailyMail (July 26, 2007). Retrieved on 2007-11-01.
Day, Marcus, Aliens: Encounters with the Unexplained CLB. 1998
Emenegger Robert, UFO's Past, Present & Future, Ballantine Paperbacks, 5th Printing, July, 1978, Pages 52 & 53.
Campbell, Steuart, The UFO Mystery Solved, Explicit Books 1994. ISBN 0-9521512-0-0
Canada's Unidentified Flying Objects: The Search for the Unknown, a virtual museum exhibition at Library and Archives Canada
BEAMS Investigations - UFO Report Database With Video & Pictures
[6] UFO Video Footage in Costa Rica
MUFON - UFO sightings plus pictures and videos
UFO Casebook - UFO sightings plus pictures and videos
UFO Seek - UFO sightings
UFO Evidence - UFO photos
Artilife - UFO photos
UFO Waves by Richard Hall (Includes notable UFO sightings sorted by decade)
Chilean UFO sightings on 1868 (Copiapo) and others in the world
Ufodna - database with many UFO sightings