OVNIs : 1947-1968

1. L'activité initiale : le projet Sign
2. Le project Grudge. Premiers livres et articles de magazines
3. La Commission Robertson
4. Réglements concernant les rapports d'ovnis
5. L'orthoténie, le "mystère des lignes droites"
6. Le Rapport O'Brien et les événements qui y ont mené
7. Démarrage du projet Colorado

Références

• Adamski, G.: Inside the Space Ships, New York: Abelard-Schuman, 1955.
• Allen, W. Gordon. Spacecraft from Beyond Three Dimensions -- a New Vista of the Entirety from which Emerges the UFO, New York: Exposition Press, 1959.
• Arnold, Kenneth E. et Ray Palmer. The Coming of the Saucers: a Documentary Report on Sky Objects that Have Mystified the World, Boise: K. A. Arnold, 1952.
• Bloecher, Ted. Report on the UFO Wave of 1947, Copyright de Ted Bloecher, 1967 (pas d'adresse).
• Condon, Edward U. et G. H. Shortley. The Theory of Atomic Spectra, New York and London: Cambridge University Press, 1935.
• Edwards, Frank, Flying Saucers -- Serious Business, New York: Lyle Stuart, 1966.
• Edwards, Frank. Flying Saucers -- Here and Now! New York: Lyle Stuart, 1967.
• Fuller, J. G.: Incident at Exeter, New York: G. P. Putnam's Sons, 1966a.
• Fuller, J. G.: The Interrupted Journey, New York: Dial Press, 1966b.
• Fuller, J. G.: "Flying Saucer Fiasco," Look, 32: 58, (14 May 1968).
• Goudsmit, S. A. Alsos, New York: Henry Schuman, Inc., 1947.
• Groves, L. R. Now It Can Be Told, New York: Harper and Brothers, 1962.
• Guieu, Jimmy. Les Soucoupes Volantes Viennent d'un autre monde, Paris: Fleuve Noir, 1954. Edition anglaise : Flying Saucers Come from Another World, London: Hutchinson, 1956.
• Heard, Gerald. The Riddle of the Flying Saucers, London: Carroll and Nicholson, 1950.
• House Committee on Armed Services, the transcript of the 5 April hearing occupies pp. 5991-6075 of the printed record of this committee for the second session of the Eighty-ninth Congress.
• Keyhoe, D. E.: The Flying Saucers are Real, London: Hutchinson, 1950.
• Irving, David. The Virus House, London: William Kimber, 1967.
• Jones, R. V. "The Natural Philosophy of Flying Saucers," Physics Bulletin 19, (1968), 225-230, (reproduced as Appendix V).
• Lear, J.: "The Disputed CIA Document on UFOs," Saturday Review, (3 septembre 1966), 45-50.
• Leslie, D. & Adamski, George: Flying Saucers Have Landed, London: Werner Laurie, 1953.
• Leslie, D. & Adamski, George: Flying Saucers Have Landed, New York: British Book Centre, 1953.
• Lorenzen, C.: The Great Flying Saucer Hoax: the UFO Facts and Their Interpretation, New York: William-Frederick Press, 1962. Paperback edition titled: Flying Saucers: the Startling Evidence of the Invasion From Outer Space, New York: New American Library, 1966.
• McDonald, James. "Are UFOs Extraterrestrial Surveillance Craft?" discours devant l'American Institute of Aeronautics and Astronautics, Los Angeles, 26 mars 1968.
• Menzel, Donald H. Flying Saucers, Cambridge: Harvard University Press, 1953.
• Menzel, Donald H. "Do Flying Saucers Move in Straight Lines?" Flying Saucer Review, 10, 2, (1964), 3.
• Michel, Aimé. The Truth About Flying Saucers, New York : Criterion Books, Inc., 1956.
• Michel, Aimé. Mysterieux Objets Celestes, Paris: Arthaud, 1958. English edition: Flying Saucers and the Straight-line Mystery, New York: S. G. Phillips Co., 1958.
• Scully, Frank. Behind the Flying Saucers, New York: Holt, 1950.
• Stanton, L. Jerome. Flying Saucers -- Hoax or Reality? New York: Belmont Books, 1966.
• Vallée, Jacques and Janine. Challenge to Science -- The UFO Enigma, Chicago: Henry Regnery Co., 1966.
• Wilkins, Harold L. Flying Saucers on the Attack, New York: Citadel Press, 1954.