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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 INDEX OF TABLES Table Al. Evaluation of All Sightings by Years 107 Table A2. Evaluation of Unit Sightings by Years . . . . s 107 Table A3. Evaluation of Object Sightings by Years 108 Table A4. Evaluation of All Sightings by Month of Year, All Years 109 Table A5. Evaluation of All Sightings by Month of Year, 1947 110 Table A6. Evaluation of All Sightings by Month of Year, 1948 Ill Table A7. Evaluation of All Sightings by Month of Year, 1949 '. . . . 112 Table A8. Evaluation of All Sightings by Month of Year, 1950 113 Table A9. Evaluation of All Sightings by Month of Year, 1951 114 Table A10. Evaluation of All Sightings by Month of Year, 1952 115 Table A l l . Evaluation of Unit Sightings by Month of Year, AH Years . 116 Table A12. Evaluation of Unit Sightings by Month of Year, 1947 117 Table A13. Evaluation of Unit Sightings by Month of Year, 1948 118 Table A14. Evaluation of Unit Sightings by Month of Year, 1949 119 Table A15. Evaluation of Unit Sightings by Month of Year, 1950 120 Table Al6. Evaluation of Unit Sightings by Month of Year, 1951 121 Table A17. Evaluation of Unit Sightings by Month of Year, 1952 . 122 Table A18. Evaluation of Object Sightings by Month of Year, All Years 123 Table A19. Evaluation of Object Sightings by Month of Year, 1947 124 Table A20. Evaluation of Object Sightings by Month of Year, 1948 ' 125 Table A21. Evaluation of Object Sightings by Month of Year, 1949 126 Table A22. Evaluation of Object Sightings by Month of Year, 1950 127 Table A23. Evaluation of Object Sightings by Month of Year, 1951 128 Table A24. Evaluation of Object Sightings by Month of Year, 1952 129 Table A25. Evaluation of All Sightings by Sighting Reliability Groups, All Years 130 Table A26. Evaluation of All Sightings by Sighting Reliability Groups, 1947 130 Table A27. Evaluation of All Sightings by Sighting Reliability Groups, 1948 130 Table A28. Evaluation of All Sightings by Sighting Reliability Groups, 1949 130 Table A29. Evaluation of All Sightings by Sighting Reliability Groups, 1950 131 Table A30. Evaluation of All Sightings by Sighting Reliability Groups, 1951 . '. 131 Table A31. Evaluation of All Sightings by Sighting Reliability Groups, 1952 131 Table A32. Evaluation of Unit Sightings by Sighting Reliability Groups, All Years 132 Table A33. Evaluation of Unit Sightings by Sighting Reliability Groups, 1947 .• 132 97
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.