Lorenzen, Coral E.The Great Flying Saucer Hoax, New York:
William-Frederick Press, 1962.
Lowell, Percival H.Mars and its Canals, New York: The Macmillan Company, 1908.
Markowitz, William, The Physics and Metaphysics of Unidentified
Flying Objects, Science, 157 (1967), 1274-79.
Menzel, Donald H.Flying Saucers, Cambridge: Harvard
University Press, 1952.
Menzel, Donald H. and Lyle G. Boyd. The World of Flying
Saucers, New York: Doubleday, 1963.
Miller, Stanley L. "Production of Organic Compounds under Possible Primitive Earth Conditions," Journal
American Chemical Society, 77 (1955), 2351-61.
Olsen, T. The Reference for Outstanding UFO Sighting Reports, Ridenwood, Maryland: UFOIRC, Inc.
Page, R. M. The Origin of Radar, Garden City, New York: Doubleday, Anchor Books, 1962.
Purcell, Edwin. "Radioastronomy and Communication Through Space," Brookhaven Lecture Series No. 1,
Brookhaven National Laboratory, New York, 16 November 1960.
Ruppelt, E. J.The Report on Unidentified Flying Objects,
New York: Doubleday and Company, Ace Books, 1956.
Rush, J. H.The dawn of life (New York: Doubleday & Co., Inc.
1957 - also Signet Library of Science, New American Library, N.Y. 1962)
Sullivan, Walter. We Are Not Alone, New York: McGraw-Hill Book Co., 1964, New York: New American Library
(paperback edition), 1966.
Shklovskii, I. S. Artificial Satellites of Mars and Riddle of the Martian Satellites, Moskow:
Komsomal'skaya Pravda, 1 May and 31 May 1959, English translation, FTD-T[-62-488-1, Wright Patterson AFB, 18 May
1962.
Shklovskii, I. S., and Carl Sagan. Intelligent Life in the Universe, San Francisco: Holden-Day, 1966.