Subject heading
Unidentified flying objects
208 books carry this heading. It is a source-library term, kept as recorded; related traditions and headings below are drawn from co-occurrence, not editorial judgment.
Related traditions
Related subjects
- Sightings and encounters79
- Alien abduction30
- Human-alien encounters27
- Unidentified flying objects, sightings and encounters26
- History24
- Text21
- Life on other planets19
- Ovnis18
- Parapsychology18
- United States18
- Non-fiction literature17
- UFO17
- Curiosities and wonders15
- Ufon15
- Extraterrestrial beings10
- Occultism10
- Fiction9
- Observations et rencontres9
- Flying saucers8
- Government policy8
Books
Open in Browse208 books
Era
OVNI y fuerzas armadas
CristiRifo Morales Riffo M
2004Spanish
UFO
Clas Svahn, Åke Persson
2000Swedish
UFOer og rumvæsener
Mikael Rothstein
2000Danish
Ufo's über Deutschland
Alfons Drothen
1995German
Zijn we alleen?
Marieke Groen
1999Dutch
Final report of the scientific study of unidentified flying objects
University of Colorado, Edward Uhler Condon
1969
Flying saucers
Georg Unger
1958
McX
1997
New UFO breakthrough
Brad Steiger, Joan Whritenour
1968
Preliminary assessment
United States Office of the Director of National Intelligence
2021
Some kind of heavenly fire
Setanta Books
2020
Space, gravity, and the flying saucer
Leonard G Cramp
1954
The Bible and flying saucers
Barry H Downing
1968
The flying saucer conspiracy
Donald E Keyhoe
1955
Le-ʻenehem bilvad
Techia Eshet
2015Hebrew
Space, fact and fiction
Mollie Bowen
1972