Sanderson, Ivan. 1967.
—. 1970.
Saunders, David R., and R. Roger Harkins. 1968. UFOs ?
Saunders, Frances Stoner. 2000.
Scientific Advisory Board. 1948. “Utilization of Technical Intelligence” (17-18 March). Washington, D.C.: The Pentagon. http://wwwproject1947.com/fig/afsab.htm.
Scully, Frank. 1950.
Sheaffer, Robert. 1981.
Simpson, Cornell. 1966.
Smith, Capt. E. J. 1947. Interview by District Intelligence Officer, Thirteenth Naval District. Seattle, Washington (09 July).
Smith, W B. 1950. “Memorandum to the Controller of Telecommunications.” Top Secret Confidential Department of Transport, Intradepartmental Correspondence (21 November). Ottawa, Ontario.
Steiger, Brad, ed. 1976.
Strategic Air Command. 1949. Memorandum to Director of FBI (10 January). SAC Knoxville. Subject: “Flying Saucers” Observed over Oak Ridge Area.
Stringfield, Leonard H. 1957.
—. 1977.
Sullivan, Walter. 1964.
Summers, Anthony. 1994.
Tacker, Lawrence. 1960. Flying Saucers
Talbert, Ansel E. 1955. “Work to Break Gravity Barrier”; “Future Planes May Defy Gravity and Air Lift in Space Travels”; “Engineers Aiming to Flout Gravity.” Articles in
Tauss, Edward. 1952. Letter from Acting Chief of the Weapons and Equipment Division of the Office of Scientific Intelligence to the Deputy Assistant Director of OSI (01 August).
Thomas, Gordon. 1989.
Thomas, Kenn. 1999.
Tomlinson, Arthur. 1993. Look Back in Astonishment. In UFOs, The
True. 1954. “What Our Air Force Found Out about Flying Saucers.” (April).
Tully, Andrew. 1969.
—. 1991. Articles (vol. 6, nos. 1 and 2).
—. 1993a. vol. 8, no. 2.
—. 1993b. vol. 8, no. 3.
—. 1993c. vol 8, no. 5.
United Press. 1947. Story, 04 July.
U.S. Air Force. n.d.a. Fact Sheet 95-03. “Unidentified Flying Objects and Air Force Project Blue Book.” Air Force Link. The Official Site of the U.S. Air Force. http://wwwaf.mil.
—. n.d.b.
—. n.d.c. Air Force Information Policy Letter for Commanders, Vol. XIV, no. 12. Issued by Office of Secretary of the Air Force.