| Author's List |
| title | creator | language | description | tableOfContents | contributor | subject | created |
| Federal Bureau of Investigation FOIA Documents - Unidentified Flying Objects | United States. Federal Bureau of Investigation | en | These records were released under the United States Freedom of Information Act. | 2008-06-05 | |||
| The Report on Unidentified Flying Objects | Ruppelt, Edward J., 1922-1960 | en | 2005-12-18 | ||||
| USAF Fact Sheet 95-03 Unidentified Flying Objects and Air Force Project Blue Book | United States. Air Force | en | Project Blue Book (U.S.); Unidentified flying objects | 2008-06-01 |