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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.
“UFO Files”16 pages
Zigel', Felix Yu. Manevr tungusskogo tE:~a [Maneuvering of the Tunguska objed). Smena, Feb. 1967: 30. Summary of a lecture delivered by the author before the Sternberg State Astronomical !11.:~itute's Section on Int.. rstellar Communications. Author cites testimony of a number of witne' > that shortly before the Tunguska explosion, the object made a 90° turn, corroborating his theory that the Tunguska body was artificial. ----- Pocherk tungsskogo vzryva f Handwriting of the Tunguska explosion]· Smena, No. IO, May 1966: 22-25. In the article the author shows and compares three microbarograms: one from a chemical explosion, one from a nuclear explosion, and that frcm ::be Tunguska explosion. He states that the microbart>gram of the Tunguska explosion is unlike that of the first two. He concludes that the Tunguska explosion was not caused by a meteorite or by a comet. He speculates whether the Tunguska object may be an artificial or man-made body, anti-matter, or a spaceship from another planet. 359
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.