1. R. A. Alpher and D. R. White, “Refractive index of dissociated and∕or ionized gases,” General Electric Research Laboratory, Schenectady, New York. Report 58-RL-2079, August, 1958 (a journal publication is in process).
2. G. B. F. Niblett and A. Kenny, “An approximate calculation of equilibrium conditions behind shock waves in the noble gases,” Princeton University department of Physics Technical Report II–24, October, 957.
3. Hirschfelder, Curtiss, and Bird,Molecular Theory of Gases and Liquids(John Wiley & Sons, Inc., New York, 1954).