UFOs (Unidentified Flying Objects) & Extraterrestrial Life
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| Author | Title | Edition | Format | Price | Puborg |
| Columbus Optical SETI (COSETI) Observatory Glossary [Terms in Search for ExtraTerrestrial Intelligence] | On-Line | Free | |||
| Condon, Edward U | Final Report of the Scientific Study of Unidentified Flying Objects | Html | Free | ||
| Craig, Roy, 1924- | UFOs | 1995 | NetLibrary | 19.95 | UNorthTexasPr |
| Davis, Amanda | Extraterrestrials | 1997 | NetLibrary | 19.50 | PowerKidsPr |
| Keyhoe, Donald | The Flying Saucers are Real | Txt-G | Free | GutenbergUS | |
| Keyhoe, Donald | The Flying Saucers Are Real | 1950 | Html | Free | SacredTexts |
| Keyhoe, Donald | The Flying Saucers are Real [copyright] | Audio | Free | GutenbergUS | |
| Landau, Elaine | UFOs | 1996 | NetLibrary | 20.90 | MillbrookPr |
| University of Colorado | Final Report of the Scientific Study of Unidentified Flying Objects | Html | Free |
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