1. Iowa City, Iowa.
2. Run Computer Run, Harvard University Press, Cambridge, Mass., 1969.
3. The Works of Charles Dickens, A Tale of Two Cities, vol. 13, P.F. Collier and Son, New York, 1911, p. 7.
4. remarks in an address: “An Environment for Survival,” Iowa City, Iowa, November 27, 1973.
5. and , Elementary Practical Physics, The MacMillan Co., New York, 1953.