Documents / Report
This is Project Blue Book Special Report No. 14, "Analysis of Reports of Unidentified Aerial Objects," Project No. 10073, dated 5 May 1955. The study reduced about 4,000 sighting reports received by the U.S. Air Force between June 1947 and December 1952 to IBM punched cards and analyzed them statistically, including chi square tests comparing knowns with unknowns. It concludes that the reports very probably do not represent technological developments beyond present scientific knowledge, and it notes that no case produced physical evidence.
m 1947 117= /Q94 8 %/ 143 = 6 3 % < i 9 4 9 , X 9 - e % 186 = 8.5 %, I95O 209= VI952, 1501 = 68.3% 1952 1722= 74% 1952 2018 = 630% 1951 160 = 5.0% Object sightings 2199 =100% All sightings 3201 = 100% Unit sightings 2554=100% FIGURE I FREQUENCY OF SIGHTINGS BY YEAR FOR OBJECT, UNIT, AND ALL SIGHTINGS A-7479 17
Report, cited by the archive. The PDF is mirrored here; the original link is above. 309 pages are in the text index: search them above, or from the library's search.