[[XII-7]] Nash, W. B., and Fortenberry, W. H. “We Flew Above Flying Saucers,” True magazine (October 1952).
[[XII-8]] Boston Herald, June 3, 1962.
[[XII-9]] “Radar Objects Over Washington,” Air Weather Service Bulletin (September 1954), pp. 52–57.
[[XII-10]] Gifford, J. F. Personal communication.
[[XII-11]] “Have We Visitors from Outer Space?” Life magazine, April 4, 1952.
[[XII-12]] “Flying Saucers, the Enigma of the Skies,” Armstrong Circle Theatre TV Script, Jan. 22, 1958.
[[XII-13]] Michel, A. The Truth about Flying Saucers. New York: Criterion Books, 1956.
[XII-14] Tombaugh, C. W. Personal communication.