[III-1] Ruppelt, E. J. The Report on Unidentified Flying Objects. Garden City, N.Y.: Doubleday & Co., 1956.

[III-2] Air Force Files.

[III-3] Menzel, D. H. Flying Saucers. Cambridge, Mass.: Harvard University Press, 1953.

[III-4] Tacker, L. J. Flying Saucers and the U. S. Air Force. Princeton, N.J.: D. Van Nostrand Co., 1960.

[III-5] Keyhoe, D. E. Flying Saucers from Outer Space. New York: Henry Holt & Co., 1953.

[III-6] Scully, F. Behind the Flying Saucers. New York: Popular Library, Inc., 1951, p. 144.

[III-7] Sarson, P. B. “Aircraft Condensation Aura,” Meteorological Magazine, London, Vol. LXXXV (1956), p. 217.

[III-7a] Johannesburg Star, April 14, 1958.

[III-8] Case 142, CRIFO Orbit, Vol. II (March 2, 1956).

[III-9] Detroit Times, Feb. 25, 1959.

[III-10] Barker, G. “Chasing the Flying Saucers,” Flying Saucers (July 1959), p. 24 ff.

[III-11] Kirsch, F. A. “Air Force Right on Killian ‘Saucer’?” Flying Saucers (August 1960), p. 17 ff.

[III-12] “Report on Unidentified Flying Objects Observed Feb. 24, 1959, by American-United Airline Pilots.” Compiled by Unidentified Flying Objects Research Committee, Akron, Ohio, Feb. 24, 1960.

[III-13] Wylie, C. C. [Speech] Popular Astronomy, Vol. LVI (1948), p. 217.

[III-14] Smithsonian Astrophysical Observatory, The SAO News, Vol. I, No. 6 (November 1961).

[III-15] Dean, C. W. Personal communication.