Playboy Interview, Volume 10, No. 3 (p. 42), March 1963; later quoted in Kenneth Rose "One Nation Underground: The Fallout Shelter in American Culture" (p. 39), 2004.
Bertrand Russell, Ray Perkins (Jr.) (2002). “Yours Faithfully, Bertrand Russell: A Lifelong Fight for Peace, Justice, and Truth in Letters to the Editor”, p.7, Open Court Publishing