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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.
“Scientific American”22 pages
PREFACE This bibliography will indicate to many that the subject of unidentified flying objects is far broader and more complicated than has been recognized by the adherents to any one theory or solution. There are deep historical roots, involved social and psycho- logical implications, and a complex overlapping of many disparate subject fields. It would seem that the whole must be studied to understand the significance of the parts, and the phenomenon would seem to be multiple in case and diffuse in source. There is no simple, single explanation of the UFO phenomenon that can be applied to all cases described in the literature. In historical perspective, UFO literature, especially during the last two decades, indicates a pat~flrn of brief but voluminous "waves." These are made up of books, magazine artic 1 e1::> and newspaper stories devoted to detailed descriptions of unidentified flying objects, including controversial acc·:>Unts of people who claim to have had direct personal experience with these objects and their occupants. Each new wave of literature is a rediscovery of an old subject, for the tales of marvelous flying machines piloted by unearthly beings can be traced even beyond their mention in the ancient Hindu scriptures. Also, it should be noted that the folklore and mythology of many countries and the legends of many aboriginal tribes seem to be inte- grally related - - if not completely bound - - to the belief that this planet's skies are occupied, perhaps even populated, by entities supe!'ior to man. Thousands of books and pamphlets on the UFO phenomenon have appeared, offering a wide range of speculation and explanation. Some of these works were first published in the lSth century. An appreciable wave of "flying saucer" literature appeared in the, 1920' s, simultaneously with astronomers' growing interest in other planets. The most. popular thesis has always been that the UFOs and theh· occupants are visitors from another planet or from a distant star system. However, in 1818, some individuals became convinced that the earth is hollow and that another and alien race occupies its interior. Since 1944, much material has been published to support this "inner earth" theory and the hypothesis that UFOs originate there. iii
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.