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This is Government Attic's posting of a 1969 Library of Congress annotated bibliography, UFOs and Related Subjects, compiled by Lynn E. Catoe for the Air Force Office of Scientific Research. The Defense Technical Information Center released it under FOIA in November 2014. The bibliography lists more than 1,600 items and was requested to support the University of Colorado UFO study led by Edward U. Condon. Its preface concludes that no simple, single explanation of the UFO phenomenon applies to all cases.
“Gray”27 pages
Schopfer, Siegfried. Fliegende Untertassen: ja oder nein? Stuttgart, Walter Hadecke Verlag, 1955. 32 p. lMdence rel2.ting to UFOs is examined and author concludes that although nallucinations, images, and fantasies relating to the pheilomenon may be real, there is no such thing as a flying saucer. Shalett, Sidney. What you can believe about flying saucers. Saturday evening post, v. 221, May 7, 1949: 36, 184··186. Applies "logical" explanations to reported facts of UFO sightings and con- cludes they arc results of tricks played hy sun, stars, and senses. Sharp, Peter F. An appraisal of the present UFO position. Flying saucer review, v. 7, 1961: 19-22. Analysis of current hypotheses which attempt to explain UFO phenomena. Slim chance for saucer sightings. Science digest, v. 43, Feb. 1958: 60. USAF says there are less than two chances in 100 that UFO sightings cannot be identified as familiar objects, reports Chemical and Engineering News. The six categories into which USAF places UFOs are: balloons, aircraft, astronomical, other (i.e., .reflections, searchlight3, birds, clouds, hoaxes, ice crystals, fireballs), insufficient data, and unknowns. Some "saucers'' may be electrical. New scientist, v. 31, Sept. 1, 1966: 463. Discussion of Philip J. Klass' theory that corona discharges, in the shape of balls of luminous gas, occur when there are salt deposits on very high voltage transmission lines and account for many UFOs. Something in the air. Time, v. 60, Aug. 11, 1952: 58. Radar impulses bouncing off a temperature inversion are suggested as the explanation for mysterious radar ''blips" believed by some to be caused by flying saucers over the Capitol in Washington, D.C., July 20-21, 1952. Siace visitors: examples of mysterious and well-authenticated unidentified flying objects, by "Theorist." Practic3.l mechanics, v. 24, Dec. 1956: 138-141. Sprinkle, R. Leo. Patterns of UFO reports. Laramie, Wyoming, The Author, 1967. 15 p. 126
Document, cited by the archive. The PDF is mirrored here; the original link is under it. 419 pages are in the text index: search them above, or from the library's search.