Primary Sources Popular Mechanics, November 2000 "America's Nuclear Flying Saucer" Retrieved June 23, 2010 Oberto, R. J. (1962, October). Environmental control systems selection for manned space vehicles. Volume II, Appendix I, missions, vehicles, equipment. (AD333266). Parsch, A. (2003-2005). Pye Wacket Archived May 11, 2016, at the Wayback Machine Hilton, W. F. (1958, April). Flying saucers: Are they best for space flight? Aircraft and Missiles Manufacturing, pp. 50, 51, 82. Anderson, A. (1960, March). Force tests of lenticular configurations at supersonic speeds. (AD0315671). Blanchard, U. J. (1961, September). Landing characteristics of a lenticular-shaped re-entry vehicle. (AD263072) Maccabee, B. (1997). Acceleration.[1] Archived December 11, 2006, at the Wayback Machine Industry Observer. // Aviation Week & Space Technology, June 3, 1963, v. 78, no. 22, p. 19.