Standardwerke

Dolan, M. Richard, (2009), UFOs and the National Security State – The Cover-Up Exposed, Volume Two: 1973-1991, Rochester, NY, Keyhole Publishing. Details

Hall, Richard, (2001), The UFO Evidence: Volume II – A Thirty-Year Report, Lanham, MD, Scarecrow Press. Details

Dolan, M. Richard, (2000), UFOs and the National Security State – An Unclassified History, Volume One: 1941-1973, Rochester, NY, Keyhole Publishing. Details

Sturrock, Peter A., (1999), The UFO Enigma: A New Review of the Physical Evidence, New York, Warner Books. Details

Hynek, J. Allen & Imbrogno, Philip J. & Pratt, Bob, (1998), Night Siege: The Hudson Valley UFO Sightings, 2nd edition, St. Paul, MN, Llelewellyn Publicaions. Details

Rutledge, H. D., (1981), Project Identification: The First Scientific Field Study of UFO Phenomena, Englewood Cliffs, NJ, Prentice-Hall. Details

Haines, R., (1980), Observing UFOs, Chicago, IL, Nelson-Hall. Details

Hendry, A., (1979), The UFO Handbook, Garden City, NY, Doubleday. Details

Gindilis, L. M. & Menkow, D. A. & Petrowskaja, I. G., (1978), Observations of Anomalous Amospheric Phenomena in the USSR: Statistical Analysis, CUFOS. Details

Velasco, J.-J., (1978), "Classification by Number of Analyzed UFO Reports in France During 1974-1978 ", 1987 MUFON International UFO Symposium Proceedings , Mutual UFO Network, Washington D.C.. Details

Hynek, J. Allen, (1978), UFO-Begegnungen der ersten, zweiten und dritten Art, München, Goldmann. Details

Hynek, J. Allen, (1978), UFO-Report: Ein Forschungsbericht, München, Goldmann. Details

Jacobs, David, (1975), The UFO Controversy in America, Bloomington, IN, Indiana University. Details

McCampbell, James M., (1973), UFOlogy: New Insights From Science and Common Sense, San Francisco, CA, Hollmann. Details

Condon, E. & Gillmor, D. (Hrsg.), (1969), Scientific Study of Unidentified Flying Objects, New York, Dutton. Details

Vallée, Jacques & Vallée, Janine, (1967), Challenge to Science: The UFO Enigma, Chicago, IL, Henry Regnery Press. Details

Vallée, Jacques, (1965), Anatomy of a Phenomenon, Chicago, IL, Henry Regnery Press. Details

Hall, Richard, (1964), The UFO Evidence, National Investigations Committee on Aerial Phenomena, Washington D.C.. Details

Michel, Aimé, (1958), Flying Saucers and the Straight-Line Mystery, New York, Criterion Press. Details

Ruppelt, Edward, (1956), The Report on Unidentified Flying Objects, New York, Doubleday. Details

Davidson, Leon, (1956), Flying Saucers: An Analysis of the Air Force Blue Book Special Report No. 14, White Plains, NY, Davidson. Details

Keyhoe, Donald, (1954), Der Weltraum rückt uns näher: US-Verteidigungsminisgterium gibt Geheimmaterial über die sogenannten Fliegenden Untertassen frei, Berlin, Blanvalet. Details