Blue Book was one of a series of systematic studies of Unidentified flying objects
(UFOs) conducted by the United States Air Force (U.S.A.F.). Started in 1952,
it was the second revival of such a study. A termination order was given for
the study in December 1969, and all activity under its auspices ceased in
Air Force History’s Referencing
UFOs in the Blue Book Era
of the Directorate of Intelligence June 1 – December 31 1952 [13 Pages,
of the 5th Air Force, Daily Intel Summary, October 1952 [7 Pages,
the 5th Air Force, Daily Intel Summary, August 1952 [7 Pages,
Learned, Headquarters, 52d Combat Aviation Battalion, 22 September 1969 [54
Pages, 3MB] – It is unclear if this document is part of the Blue Book system.
It does confirm, however, that towards the end of the Blue Book era, military
installations were still seeing UFOs – some they were later able to identify
– while others they were not.
The Condon Committee Report
contains the results of a scientific inquiry into the phenomena of
Unidentified Flying Objects. This volume contains: (1) The scientific
context, (2) Appendices A-X, and (3) The index.
are searchable .pdf files, however, are quite large. Please note the file
Condon Report, Volume 1, January 1969 [529 Pages, 174MB]
Condon Report, Volume 2, January 1969 [374 Pages, 233MB]
Condon Report, Volume 3, January 1969 [523 Pages, 275MB]
Other Related Documents
Blue Book Status Report Number 8, 31 December 1952 [17 Pages, 0.8MB]
– This item can be found on microfilm roll number 85 of microfilm
publication T1206. Project ‘Bluebook.’, 1947-1969.
I to Project Blue Book Status Report Number 8 [1 Page, 0.8MB]
Blue Book [43 Pages]
Blue Book FBI File [13 Pages] – This small file relates to an Air Force
program for the investigation of Unidentified Flying Objects. The Secretary
of the Air Force discontinued this program in 1969.
Blue Book Records, Air Force Missile Development Center, 1947-1970 [42
Pages, 5.18MB] – These documents were obtained from the Air Force Historical
Research Agency (AFHRA).
the University of Colorado Report on Unidentified Flying Objects by a Panel
of the National Academy of Sciences – The ad hoc committee concurs with
the findings of the report of the University of Colorado entitled ‘Scientific
Study of Unidentified Flying Objects,’ Dr. Edward U. Condon, Scientific
Director. Panel agrees that a study of UFOs in general is not a promising way
to expand scientific understanding of the phenomena, and adds: ‘On the basis
of present knowledge the least likely explanation of UFOs is the hypothesis
of extraterrestrial visitations by intelligent beings.’
Aerial Objects Project “Sign” [55 Pages, 19.8mb] – This is the best copy
available, which was obtained by the DTIC.