Subject heading
Unidentified flying objects
224 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 encounters86
- Alien abduction30
- Human-alien encounters28
- Unidentified flying objects, sightings and encounters26
- History25
- Text21
- Life on other planets19
- Ovnis18
- Parapsychology18
- United States18
- Non-fiction literature17
- UFO17
- Curiosities and wonders16
- Ufon15
- Extraterrestrial beings10
- Fiction10
- Religious aspects10
- occultism10
- Observations et rencontres9
- Flying saucers8
Books
Open in Browse224 books
Projekt UFO
William Allen Harbinson
1995
Realms of the unreal
J. M Ippolito
2010
The Gods have landed
James R Lewis
1995
The boys from Topside
Wilbert B. Smith
1969
Tomorrow's technology today
Norman R. Bergrun
1972
True hallucinations
Terence K. McKenna
1993
UFO
Peter Brookesmith
1995
UFO
Bill Yenne
2007
UFOs
Robert C Trundle
2000
UFOs
Ron Halliday
1997
Ilha de Colares na Amazônia
Agildo Monteiro
2017Portuguese
Manifiesto OVNI de Puerto Rico, Santo Domingo y Cuba
Sebastián Robiou Lamarche
1979Spanish
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