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[V-2] Keyhoe, D. E. The Flying Saucer Conspiracy. New York: Henry Holt & Co., 1955.

[V-3] Biot, J. B. “Account of a Fire-ball which Fell in the Neighborhood of Laigle.” Philosophical Magazine, Vol. XVI (1803), pp. 224–28.

[V-4] Whipple, F.L., and Hawkins, G. S. “Meteors,” Handbuch der Physik, Vol. LII (1959), pp. 519–64.

[V-5] Nininger, H. H. Out of the Sky. University of Denver Press, 1952; New York: Dover Publications, 1959.

[V-6] Menzel, D. H. Personal files.

[V-7] Ruppelt, E. J. The Report on Unidentified Flying Objects. Garden City, N.Y.: Doubleday & Co., 1956.

[V-8] Meteoritics, Vol. III, 1955.

[V-9] Meteoritics, Vol. I, 1953.

[V-10] Millman, P. M., and Halliday, I. “The Near-Infra-Red Spectrum of Meteors,” Journal of Planetary and Space Science, Vol. V (1961), pp. 137–40.

[V-11] Millman, P. M. “An Analysis of Meteor Spectra,” Annals of Harvard College Observatory, Vol. LXXXII, Nos. 6 and 7 (1917–37), pp. 113–77.

[V-12] Robey, D. H. “An Hypothesis on the Slow Moving Green Fireballs,” Journal of the British Interplanetary Society, Vol. XVII (1959–60), pp. 398–411.

[V-13] Krinov, E. L. Principles of Meteoritics. New York: Pergamon Press, 1960.

[V-14] O’Keefe, J. A. “Tektites and the Cyrillid Shower,” Sky and Telescope, Vol. XXI (1961), p. 4.

[V-15] Fesenkov, V. G. “Cloudiness of the Atmosphere Produced by the Fall of the Tunguska Meteorite of June 30, 1908,” Meteoritika, Vol. VI (1949), p. 8.

[V-16] Nininger, H. H. “Tracing the Norton, Kansas, Meteorite Fall,” Sky and Telescope, Vol. VII (1948), p. 294.

[V-17] La Paz, L. “The Achondritic Shower of February 18, 1948,” Publications of the Astronomical Society of the Pacific, Vol. LXI (1949), p. 63.

[V-18] Wilson, A. S. [Letter] Sky and Telescope, Vol. XXII (1961), p. 3.

[V-19] Air Force Files.

[V-20] Tacker, L. J. Flying Saucers and the U. S. Air Force. Princeton, N. J.: D. Van Nostrand Co., 1960.

[V-21] Chant, C. A. “An Extraordinary Meteoric Display,” Journal of the Royal Astronomical Society of Canada, Vol. VII (1913), pp. 145–215.

[V-22] Olivier, C. P. “Tables of Hourly Rates Based Upon American Meteor Society Data.” Interim Report No. 28, Harvard University Radio Meteor Research Program (May 1958).

[V-23] Whipple, F. L. Personal files.

[V-24] Jacchia, L. G. “The Descent of Satellite 1957 Beta One,” Smithsonian Astrophysical Observatory, Special Report No. 15, July 20, 1958.