| title | ISBN-13 | year of publica- tion | other author(s) | |
|---|---|---|---|---|
| Architecture of the Universe | 978-0-8053-4747-0 | 1979 | Necia H. Apfel | |
| Astronomy One | 978-0-8053-4749-4 | 1972 | " | |
| Night Siege: The Hudson Valley UFO Sightings | 978-1-56718-362-7 | 1998 | Philip J. Imbrogno · Bob Pratt | |
| Night Siege: The Hudson Valley UFO Sightings | 978-0-345-34213-3 | 1987 | ||
| Ovnis sur l'Hudson River | 978-2-84197-560-0 | 2011 | Philip J. Imbrogno · Bob Pratt | |
| The Andreasson Affair: The Documented Investigation of a Woman's Abduction Aboard a UFO | 978-0-13-036608-5 | 1979 | Raymond E. Fowler | |
| The Hynek UFO Report | 978-0-285-63407-7 | 1998 | ||
| The Hynek UFO report | 978-0-7607-0429-5 | 1997 | ||
| The UFO Experience | 978-0-345-27361-1 | 1977 | ||
| The UFO Experience: A Scientific Inquiry | 978-1-56924-782-2 | 1998 | ||
| UFO- Report. Ein Forschungsbericht | 978-3-442-11703-1 | 1983 | ||
A. H. · Allen H. · Dr J. Allen Hynek · J. A. · J. Allen · J. H. · J. Hynek · Joseph Allen Hynek
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