Project Sign (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Project Sign" in English language version.

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2web.archive.org

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1popularmechanics.com

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archive.org

Ruppelt, Edward J (1956). The Report on Unidentified Flying Objects (1st ed.). Doubleday & Company. p. 62. Archived from the original on 2010-01-12. Shallet's article - He pointed out how the "furor" about UFO reports got so great that the Air Force was "forced" to investigate the reports reluctantly. He didn't mention that two months after the first UFO report ATIC had asked for Project Sign since they believed that UFO's did exist. Nor did it mention the once Top Secret Estimate of the Situation that also concluded that UFO's were real. In no way did the article reflect the excitement and anxiety of the age of Project Sign when secret conferences preceded and followed every trip to investigate a UFO report. This was the Air Force being "forced" into reluctantly investigating the UFO reports.

cia.gov

"CIA's Role in the Study of UFOs, 1947-90 — Central Intelligence Agency". www.cia.gov. Archived from the original on June 13, 2007. Retrieved 2020-04-30.

google.co.uk

"Unidentified Flying Objects Hearing, Eighty-ninth Congress, Second Session, April 5, 1966". www.google.co.uk. United States Congress. House Committee on Armed Services. 1966. p. 6060. Retrieved 4 May 2025.

greyfalcon.us

"An Aeronautical History of Flying Saucers". Archived from the original on 2010-12-17. Retrieved 2011-02-11.

gutenberg.org

Ruppelt, Edward J (1956). The Report on Unidentified Flying Objects (1st ed.). Doubleday & Company. p. 62. Archived from the original on 2010-01-12. Shallet's article - He pointed out how the "furor" about UFO reports got so great that the Air Force was "forced" to investigate the reports reluctantly. He didn't mention that two months after the first UFO report ATIC had asked for Project Sign since they believed that UFO's did exist. Nor did it mention the once Top Secret Estimate of the Situation that also concluded that UFO's were real. In no way did the article reflect the excitement and anxiety of the age of Project Sign when secret conferences preceded and followed every trip to investigate a UFO report. This was the Air Force being "forced" into reluctantly investigating the UFO reports.

popularmechanics.com

Banias, M. J. (2019-12-17). "50 Years Ago, the Air Force Tried to Make UFOs Go Away. It Didn't Work". Popular Mechanics. Retrieved 2020-05-03.

web.archive.org

"CIA's Role in the Study of UFOs, 1947-90 — Central Intelligence Agency". www.cia.gov. Archived from the original on June 13, 2007. Retrieved 2020-04-30.
"An Aeronautical History of Flying Saucers". Archived from the original on 2010-12-17. Retrieved 2011-02-11.

worldcat.org

search.worldcat.org

Steiger, Brad (2019). Project Blue Book : the top secret UFO files that revealed a government cover-up. Newburyport, MA: Red Wheel/Weiser. ISBN 978-1-59003-300-5. OCLC 1078162415.